IWM-EC International Conference on Multi facets of EoS and Clustering

May 25, 2026, 8:00 AM → May 28, 2026, 7:00 PM Europe/Rome

Sala Blu (Il Fuligno (Firenze, Italy))

The XII edition of IWM-EC International Conference on Multi facets of Eos and Clustering (IWM-EC 2026) has been held in Firenze, Italy, from May 25th to 28th 2026. 

The IWM-EC 2026 was organized by the CHIMERA and INDRA-FAZIA collaborations under the patronage of INFN and the Società Italiana di Fisica (SIF)

The conference was supported by INFN - Sezione di Firenze, INFN - Commissione Scientifica Nazionale 3 (CSN3), Università di Catania, CAEN S.p.A, and AGE Scientific S.R.L.

It covered the following topics:

• Nuclear dynamics from fission to multi-fragmentation
• Isospin effects and Symmetry energy in nuclear reactions
• Clustering phenomena and multi-particle decay
• Nuclear EOS and multi-messenger astronomy
• New developments in detection techniques and facility

 

The format of the conference included overview talks with invited speakers and contributed presentations. PhD students and postdocs were strongly encouraged to participate.

IWM-EC 2026 took place at the “Centro Servizi e Formazione Montedomini” inside the historical “Educatorio del Fuligno” palace (Via Faenza 48, Firenze).

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Mon, May 25

8:30 AM → 9:30 AM Conference registration

9:30 AM → 11:30 AM Conference opening and special sessions: Conference opening

Convener: Silvia Piantelli (Istituto Nazionale di Fisica Nucleare)

9:30 AM Welcome address from INFN - Florence division head

Speaker: Giovanni Passaleva (Istituto Nazionale di Fisica Nucleare)

9:45 AM Welcome address from SIF council

Speaker: Sara Pirrone (Istituto Nazionale di Fisica Nucleare)

sif @ iwm-ec 2026.pptx

10:00 AM Recent highlights from CHIMERA

Recent highlights from CHIMERA

Speaker: Emanuele Vincenzo Pagano (Istituto Nazionale di Fisica Nucleare)

EVP_IWMEC26 _CHIMERA_pdf.pdf

EVP_IWMEC26 _CHIMERA_ppt.pptx

10:45 AM Recent highlights from INDRA-FAZIA

Recent highlights from INDRA-FAZIA

Speaker: Sandro Barlini (Istituto Nazionale di Fisica Nucleare)

IWM_barlini.pdf

IWM_barlini.pptx

IWM_barlini.pptx

11:30 AM → 11:55 AM Coffee break

11:55 AM → 1:30 PM Isospin effects and Symmetry energy in nuclear reactions

Convener: Nicolas Le Neindre (LPC Caen, CNRS-in2p3, Université de Caen)

11:55 AM Isospin effects and symmetry energy in nuclear reactions

The only way to study the properties of asymmetric nuclear matter at high densities in the laboratory conditions is to investigate the relativistic heavy ion collisions. A complementary source of information are the astrophysical observations and gravitational waves. The degree of compression and pressures achieved during the heavy ion collision depend on the susceptibility of the nuclear matter to compression, and hence on its equation of state. In particular, the measured angular and energy distributions of neutrons and protons, light isobars and of the π−and π+emitted form the interaction zone depend on the symmetry energy and its gradients at the attained densities.

Symmetry energy around normal and at sub-saturation densities can be studied through measurement of e.g. isoscaling and isospin diffusion in nuclear reactions, measurement of neutron skin, nuclear collective modes, isobaric analog states, electric dipole polarizability, charge exchange and elastic scattering, etc.

Results of the latest measurements and analyses of the stiffness of the symmetry energy and the status of current constraints will be presented, including recent observations of the possible isospin symmetry violation. Some attention will also be paid to the experimental challenges related to the measurements of charged and neutral products of relativistic heavy ion collisions in the context of the recent ASY-EOS II experiment at GSI.

Speaker: Jerzy Lukasik (IFJ PAN, Kraków, Poland)

lukasik_iwm26.pdf

12:40 PM Preliminary highlights of the isospin role in the dynamical emission with CHIMERA and FARCOS

The CHIFAR experiment at the INFN-LNS coupled the 4$\pi$ CHIMERA multi-detector with 10 telescopes of the FARCOS (Femtoscope Array for COrrelations and Spectroscopy) correlator. FARCOS is a triple-stage telescope consisting of two DSSSDs (Double Sided Silicon Strip Detectors, 300 and 1500 $\mu$m thick) and 4 CsI(Tl) scintillators (6 cm thick), featuring high energy and angular resolution. Charged particles were identified ($\Delta$E - E method) and their impinging positions were reconstructed (Pixelation technique), in the laboratory frame.
The current analysis utilizes the merged data from the CHIMERA-FARCOS coupling to investigate the influence of the isospin contribution on the dynamical emission in Heavy Ion collisions at an incident beam energy of 20 AMeV. The projectiles - $^{124}$Sn, $^{112}$Sn, $^{124}$Xe – and the targets -$^{64}$Ni, $^{58}$Ni, $^{64}$Zn – were specifically selected to emphasize the isospin content. Preliminary findings regarding the isospin distribution will be presented: the role of the N/Z ratio in the emission mechanisms of the nuclear reactions is highlighted through more stringent constraints on CHIMERA global variables (e.g. total kinetic energy, total multiplicity of charged particles, reaction plane).

Speakers: Emanuele Vincenzo Pagano (Istituto Nazionale di Fisica Nucleare), Cristina Zagami (Istituto Nazionale di Fisica Nucleare)

Zagami_IWMEC_2026.pptx

1:05 PM Studying the Symmetry Energy at GSI: Status of the ASY-EOS II Experiment

The study of the density dependence of the equation of state (EOS) of nuclear matter at supra-saturation densities is a major topic of modern nuclear physics, with important implications in many fields. These span from astrophysics, such as the behavior of neutron stars and core collapse supernovae, to heavy ion collision (HIC) phenomena. Symmetry energy can be investigated not only by means of HIC, but also from astrophysical observations, including multimessenger astronomy combining gravitational waves and electromagnetic radiation observations. HIC at intermediate energies offer the opportunity to study nuclear matter at supra-saturation densities under controlled laboratory conditions. In this context, the ASY-EOS II experiment was performed at GSI, to constrain the symmetry energy of the EOS through measurements of neutron and proton elliptic flows, which are sensitive to the symmetry pressure during the high-density phase of the nuclear collisions. The ASY-EOS II experiment investigated ${}^{197}$Au+${}^{197}$Au reactions at beam energies of 280, 400, 600 and 1000 AMeV, employing several detector systems. The KRAB detector was used for multiplicity measurements and centrality selection and, together with the CHIMERA multidetector placed at forward polar angles, reaction plane reconstruction. The TOFD detector measured forward emitted fragments for the determination of impact parameter by means of global observables such as $Z_{max}$ and $Z_{bound}$. At 50 degrees the NeuLAND detector, dedicated to neutron and proton detection and vetoed by another TOFD double plane, allows neutron detection with high efficiency and granularity. Data analysis of the experiment is still ongoing: data reduction of CHIMERA and KRAB is advanced, with good reconstruction of the reaction plane and the impact parameter. Calibration of TOFD (veto) and NeuLAND is ongoing, with particular attention to neutrons and charged particle discrimination. Preliminary results of neutron and proton elliptic flow observables, currently in progress, will be shown.

Speaker: Fabio Risitano (Istituto Nazionale di Fisica Nucleare)

Risitano - IWM-EC 2026.pptx

1:30 PM → 2:45 PM Lunch

2:45 PM → 4:20 PM New developments in detection techniques and facility

Convener: Simone Valdre' (Istituto Nazionale di Fisica Nucleare)

2:45 PM Streaming Readout and Real-Time Data Processing for Next-Generation DAQ Systems

Streaming readout (SRO) data acquisition is emerging as a key paradigm for high-luminosity nuclear and particle physics experiments, enabling triggerless operation through continuous, time-stamped data streams processed in software. By organizing detector hits into time slices and performing real-time reconstruction and selection using global detector information, SRO enables efficient data reduction and the use of advanced AI-based algorithms on heterogeneous computing platforms.

This approach is being adopted by several experiments, including CLAS12 at Jefferson Lab (in its upgrade phase) and ePIC at the Electron-Ion Collider. At Jefferson Lab, SRO architectures based on distributed microservices are under active development and validation through dedicated testbed activities carried out under realistic operating conditions. These testbeds are used to evaluate system scalability, timing synchronization, network throughput, and real-time data reduction strategies, including both conventional compression techniques and machine-learning-based methods.

In the following, representative examples of these testbeds will be presented to illustrate the design choices and performance of such systems. These studies contribute to the development of robust, scalable, and AI-enabled DAQ architectures for next-generation high-rate experiments such as ePIC.

Speaker: Mariangela Bondi (Istituto Nazionale di Fisica Nucleare)

SRO_IWM-EC_BONDI_FINAL.pdf

3:30 PM Sub-100ps high resolution VLSI frontend electronics for microstrip detectors and pad arrays

Microstrip detectors are essential, high-resolution position-sensitive sensors used in nuclear physics for tracking, vertex reconstruction, and beam monitoring. In addition to those detectors pad arrays are used when moderate position resolution is required combined with unambiguity in particle detection, for example in beam monitoring. Different ancillary detectors are based on microstrips detectors (e.g. FARCOS [1], AIDA [2], MUST [3], [4] and reference therein).
We designed and engineered a dedicated frontend based on a custom designed ASIC, intended for spectroscopy and timing measurements to be coupled with microstrip detectors or pad arrays. The frontend electronics features INL below 0.5% over the full dynamic range., energy resolution better than 15 keV FWHM at the 241Am α-particle energy, intrinsic time jitter below 100 ps from 1.5 MeV onwards – 25ps at 5 MeV and selectable gain factor from 10mV/MeV, up to 1.8mV/MeV, translating in a dynamic range of more than 15bits. With a small compromise on the time resolution the full-scale energy range can be extended up to a gain factor of 0.5mV/MeV over the full-scale range of 1.1V.
This contribution deals with the design of the frontend electronics, to its experimental qualification aimed at assessing the relevant properties for timing and spectroscopy and at making sound the estimation of the system performance when coupled with different detector systems. A full set of measurements to assess the performance of the designed electronics will be presented and critically analysed, with particular attention to possible applications.

[1] Pagano, E.; Acosta, L.; Auditore, L.; Boiano, C.; Cardella, G.; Castoldi, A.; D’Andrea, M.; Dell’aquila, D.; De Filippo, E.; De Luca, S.; et al. Status and perspective of FARCOS: A new correlator array for nuclear reaction studies. EPJ Web Conf. 2016, 117, 10008
[2] Hall, O.; Davinson, T.; Griffin, C.J.; Woods, P.J.; Appleton, C.; Bruno, C.G.; Estrade, A.; Kahl, D.; Sexton, L.; Burrows, I.; et al. The Advanced Implantation Detector Array (AIDA). Nucl. Instrum. Method A 2023, 1050, 168166
[3] Pollacco, E.; Beaumel, D.; Roussel-Chomaz, P.; Atkin, E.; Baron, P.; Baronick, J.P.; Becheva, E.; Blumenfeld, Y.; Boujrad, A.; Drouart, A.; et al. MUST2: A new generation array for direct reaction studies. Eur. Phys. J. A 2005, 25, 287–288
[4] J. Vesić; Tracking Detectors in Low-Energy Nuclear Physics: An Overview, Quantum Beam Sci. 2024, 8(3), 24; https://doi.org/10.3390/qubs8030024

Speaker: Chiara Guazzoni (Politecnico di Milano, DEIB & Istituto Nazionale di Fisica Nucleare, Sezione di Milano)

talk.pdf

talk.pptx

3:55 PM Overview of Silicon Carbide detectors for studies with Radioactive Ion Beams

N.S. Martorana$^{1}$, G. Cardella$^{1}$, E. De Filippo$^{1}$, E. Geraci$^{1,2,3}$, C. Guazzoni$^{4}$, P. Russotto$^{5}$, L. Acosta$^{6}$, A. Barbon$^{1,2}$, A. Castoldi$^{4}$, G. Colucci$^{7}$, G. D’Agata$^{1,2}$, B. Gnoffo$^{1,2}$, J. F. González Linares$^{6}$, T. Kurtukian-Nieto$^{6}$, F. La Via$^{8}$, C. Maiolino$^{5}$, E.V. Pagano$^{5}$, S. Pirrone$^{1}$, G. Politi$^{1,2}$, M Pozzi$^{4}$, K. Rani$^{7}$, F. Risitano$^{1,3,9}$, F. Rizzo$^{2,3,5}$, M. Trimarchi$^{1,9}$, A. Trzcińska$^{7}$, S. Tudisco$^{5}$, M. Wolińska-Cichocka$^{7}$, C. Zagami $^{3,5}$

1 INFN-Sezione di Catania, Catania, Italy
2 Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, Catania, Italy
3 CSFNSM, Catania, Italy
4 DEIB Politecnico Milano and INFN Sezione di Milano, Milano, Italy
5 INFN-LNS, Catania, Italy
6 Instituto de Estructura de la Materia, CSIC, Spain
7 HIL, University of Warsaw, Poland
8 Institute for Microelectronics and Microsystems (IMM), National Research Council (CNR), Catania, Italy
9 Dipartimento MIFT, Università di Messina, Messina, Italy

Radioactive ion beams, especially when produced at high intensity, represent one of the frontiers of nuclear physics, since they allow the investigation of nuclei far from stability. This makes it possible to study nuclear structure, including clustering phenomena, reaction dynamics related to the study of the equation of state (EoS), which is a key aspect in the current nuclear physics scenario, and reactions of interest for nuclear astrophysics [1–2]. In this context, several facilities worldwide, either under upgrade or currently under construction, are being developed to produce high-intensity RIBs over a wide range of energies and masses. Accordingly, advanced detector systems capable of sustaining such high rates are essential to fully exploit the potential of these next-generation facilities [1–2]. Silicon Carbide detectors are good candidates for the realization of such detection systems, thanks to their high radiation hardness, good energy response and energy resolution, fast timing performance, and a fabrication maturity that makes the production of large-area devices feasible. Indeed, they are currently regarded as a good compromise between silicon and diamond detectors [3–5]. This contribution provides an overview of studies devoted to the characterization of SiC detectors for nuclear physics studies, especially involving radioactive ion beams produced with the in-flight method, with particular focus on their fast-timing performance [5]. A special focus will be given on the preliminary results obtained in the T-INSIDE experiment, carried out at HIL, in June 2025, using the 12C+12C reaction at 73 MeV, highlighting the potential of segmented SiC detectors coupled with fast front-end electronics.

[1] https://nupecc.org/?display=lrp2024/main.
[2] Martorana N. S. et al., Frontiers in Physics, 10 (2022) and references therein
[3] Tudisco S. et al., Sensors, 18 (2018) and references therein.
[4] De Napoli M., Frontiers in Physics 10:898833, (2022) and references therein.
[5] Martorana N.S. et al., Nucl. Instrum. Methods A 1086 (2026) 171356 and references therein.

Speaker: Nunzia Simona Martorana (Istituto Nazionale di Fisica Nucleare)

IWM EC 2026 Nunzia Simona Martorana.pdf

4:20 PM → 4:45 PM Coffee break

4:45 PM → 6:00 PM Conference opening and special sessions: Angelo Pagano’s legacy

Convener: Paolo Russotto (Istituto Nazionale di Fisica Nucleare)

4:45 PM Angelo Pagano: The Man, the Scholar, the Scientist

Speaker: Emanuele Vincenzo Pagano (Istituto Nazionale di Fisica Nucleare)

EVP_IWM26_Angelo_pdf.pdf

EVP_IWM26_Angelo_pptx.pptx

5:00 PM A personal look on scientific work of Angelo Pagano

Speaker: Enrico De Filippo (Istituto Nazionale di Fisica Nucleare)

iwm2026_edf.pptx

5:30 PM Caro Angelo

Speaker: Rémi Bougault (LPC/ENSI Caen)

Angelo.pdf

7:00 PM → 11:30 PM Welcome cocktail and social dinner

Tue, May 26

8:30 AM → 9:30 AM Conference registration

9:30 AM → 11:30 AM Clustering phenomena and multi-particle decay

Convener: Mr Giovanni Casini (Istituto Nazionale di Fisica Nucleare)

9:30 AM Nuclear clustering in neutron-rich nuclei

The region of the nuclear chart corresponding to light radioactive nuclei has, over the years, yielded many surprising results, among others the discovery of the halo structure in neutron and proton dripline nuclei. This region of the nuclear chart is also rich of many other phenomena like the appearance of molecular-like structures where -particle-clusters are bound together by the exchange of neutrons or the existence of “exotic clustering” i.e. cluster configurations where at least one of the clusters is a weakly bound radioactive nucleus. The availability of post-accelerated radioactive ion beams has opened the opportunity to study nuclear structure and reactions of such peculiar nuclei. Moreover, to be able to describe the physics observables extracted from experiments theoretical models have been developed that allow to advance our understanding about the nature of the observed structures.
In this talk an overview of some of the new phenomena involving light exotic RIBs will be given and future perspectives discussed.

Speaker: Alessia Francesca Di Pietro (Istituto Nazionale di Fisica Nucleare)

dipietro_IWM2026.pptx

10:15 AM Search for molecular cluster structures in 14C via the reaction 4He(10Be,6He) at LNS

M. Figueraᵃ, A. Di Pietroᵇ, N. Szegediᵇ, D. Torresiᵇ, P. Figueraᵇ, A. Shotterᶜ, R. J. de Boerᵈ, S.Cherubiniᵇᵃ, M. La Cognataᵇ, L. Guardoᵇ, M. Gulinoᵇᵉ, L. Lamiaᵇᵃ, A. Olivaᵇ, G. Pizzoneᵇᵃ, G.Rapisardaᵇᵃ, R. Spartaᵇᵉ, M. L. Sergiᵇᵃ, A. Tuminoᵇᵉ, T. Davinsonᶜ, N. Duyᶠ, J. P. Fernández Garcíaᵍ,S. Heinitzʰ, S. Hayakawaᶦ, E. A. Maugeriʰ, M. Milinʲ, A. Nurmukhanbetovaᵇᵉ, H. Shimizuᶦ, D.Schumannʰ, N. Soićᵏ, H. Yamaguchiᶦ, L. Yangᶦ

ᵃ Dipartimento di Fisica e Astronomia, Università di Catania, I-95123 Catania, Italy
ᵇ INFN – Laboratori Nazionali del Sud, Via S. Sofia 62, I-95123 Catania, Italy
ᶜ School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
ᵈ University of Notre Dame, Notre Dame, Indiana, USA
ᵉ Facoltà di Ingegneria e Architettura, Università degli Studi di Enna “Kore”, Enna, Italy
ᶠ Department of Physics, Sungkyunkwan University; Institute of Research and Development, Duy Tan University, China
ᵍ Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, 41080 Sevilla, Spain
ʰ Paul Scherrer Institut, Villigen, Switzerland
ᶦ Center for Nuclear Study, University of Tokyo, Wako, Japan
ʲ University of Zagreb, Zagreb, Croatia
ᵏ Ruđer Bošković Institute, Zagreb, Croatia

Light nuclei may exhibit clustering behavior, with nucleon correlations giving rise to distinct groupings of protons and neutrons typically forming α particles. In some instances, these clusters assemble into molecular-like structures, bounded by valence nucleons that are shared between the clusters analogously to electrons in an atomic covalent bond. Linear-chain configurations of α particles bonded by neutrons through π or σ bonds are theoretically predicted to exist.
In this contribution we report preliminary results concerning the study of the possible σ-bond linear chain configurations of $^{14}$C, studied through the reaction $^4$He($^{10}$Be,$^6$He) measured at LNS. The excitation function is reconstructed by the analysis of the $^6$He energy spectra in the excitation energy range 19-26 MeV, where the sought structures are expected to exist.

Speaker: Martina Figuera (Università degli Studi di Catania)

Figuera_IWM.pptx

10:40 AM Study of the decay of excited 12C levels using the CHIMERA multidetector through multifold coincidence analysis

R. Cavallaro$^{*1,2}$, G. Cardella$^2$, N. S. Martorana$^2$, A. Castoldi$^3$, E. De Filippo$^2$, E. Gambera$^{1,2}$, E. Geraci$^{1,2,4}$, B. Gnoffo$^{1,2}$, C. Guazzoni$^3$, C. Maiolino$^5$, E. V. Pagano$^5$, S. Pirrone$^2$, G. Politi$^{1,2}$, F. Risitano$^{2,4,6}$, F. Rizzo$^{1,4,5}$, P. Russotto$^5$, M. Trimarchi$^{2,6}$, C. Zagami$^{4,5}$

1. Dipartimento di Fisica e Astronomia “E. Majorana”, Universitá degli Studi di Catania, Catania, Italy
2. INFN-Sezione di Catania, Catania, Italy
3. DEIB Politecnico di Milano and INFN-Sezione di Milano, Milano, Italy
4. CSFNSM, Catania, Italy
5. INFN-LNS, Catania, Italy
6. Dipartimento MIFT, Università di Messina, Messina, Italy

$^*$rosaria.cavallaro@phd.unict.it

This contribution presents preliminary results from the study of the $^4$He+$^{12}$C reaction at 64 MeV, performed at INFN-LNS, aimed at investigating the $\gamma$-decay of excited states in $^{12}$C.
This study is particularly relevant because the determination of the decay widths of $^{12}$C excited states provides important insights into nucleosynthesis processes in astrophysical environments. In particular, the state at 7.65 MeV (known as Hoyle state, $J^\pi = 0^+$) plays a key role in the production of $^{12}$C during the helium-burning phase at $T\sim 10^8 K$, while the state at 9.64 MeV ($J^\pi = 3^-$) is involved in explosive astrophysical scenarios ($T > 2 \cdot 10^9 K$). The $\gamma$-decay width of the 9.64 MeV state has been estimated in some recent works [1,2] and further investigations on its properties are still ongoing. In this context, the analysis presented in this contribution is based on a measurement that represents an improvement over a previous experimental run, which results are discussed in [2]. The goal of this improvement is to increase the statistics. In this experiment CHIMERA multidetector [3] was employed to detect reaction products.
CHIMERA is capable of detecting both $\gamma$-rays and charged particles, and this feature enables the use of multifold coincidence analysis [2], allowing the detection of all final-state reaction products.
First results on Q-value spectra will be presented. In particular, the comparison between the spectra obtained using the kinematic definition of the Q-value and those derived from the missing-energy Q-value definition will be discussed. The missing-energy spectra can be reconstructed thanks to the possibility of performing a multifold coincidence analysis and this technique allows to overcome the problems due to the limited angular resolution of the detector and also to strongly reduce the background, which is a key point for this kind of measurements. Finally, first preliminary data analysis on $\gamma$-ray detection will be shown.

References
[1] M. Tsumura et al., Phys. Lett. B 817 (2021), 136283
[2] G. Cardella et al., Phys. Rev. C 104 (2021) 064315
[3] A. Pagano et al., Nucl. Phys. A 734, 504 (2004)

Speaker: Rosaria Cavallaro (Dipartimento di Fisica e Astronomia "E. Majorana", Università degli Studi di Catania & INFN-Sezione di Catania)

RCavallaro_iwm2026.pdf

11:05 AM Μeasurement of the Ηoyle state radius using single and mutual excitation inelastic scattering

The second $0_{2}^+$ state of $^{12}$C at an excitation energy of 7.654 MeV, known as the Hoyle state [1], is crucial to understanding how $^{12}$C is formed in stellar nucleosynthesis. Despite recent studies, there is no consensus on the properties of the Hoyle state, with different theoretical models predicting a range of radii values and spatial arrangements [2-3].

Experimentally, only a few attempts have been made to measure the radius of the Hoyle state, mostly through inelastic scattering angular cross sections. The most frequently cited study reported a 0.5 fm larger Hoyle state radius than the ground state radius [4] from $^{12}$C + $^{12}$C diffusion at 121.5 MeV. However, the extraction of the Hoyle state radius was based on a simple diffusion model relying on strong assumptions. Moreover, the cross section was measured at large angles, leading to the first minimum, expected at smaller angles, being missed.

To overcome these limitations, a new experiment was conducted at GANIL in 2025 to measure the Hoyle state radius by comparing single and mutual excitation in $^{12}$C + $^{12}$C inelastic scattering using the multidetector FAZIA [5]. This comparative analysis allows for more accurate comparisons with scattering theory that incorporates realistic nuclear potentials.

In this talk, I will present this new experiment as well as the its results.

Bibliography :

[1] F. Hoyle, On Nuclear Reactions Occuring in Very Hot STARS.I. the Synthesis of Elements from Carbon to Nickel, Astrophys. J. Suppl. Ser. 1, 121, (1954).

[2] Shen, S., Elhatisari, S., Lähde, T.A. et al., Emergent geometry and duality in the carbon nucleus, Nat Commun, 14, (2023).

[3] Otsuka, T., Abe, T., Yoshida, T. et al., $\alpha$-Clustering in atomic nuclei from first principles with statistical learning and the Hoyle state character, Nat Commun,13, (2022).

[4] V. A. Maslov et al., Study of the Diffraction Scattering $^{12}$C + $^{12}$C
with the Excitation of the $^{12}$C Exotic State $0_{2}^{+}$
(the Hoyle State), Physics of Particles and Nuclei Letters, 8, (2011).

[5] S Barlini et al.,FAZIA: a new performing detector for charged particles, J. Phys.: Conf. Ser, 1561, (2020).

Speaker: Ilham Dekhissi (LPC Caen)

IWM_ID.pdf

11:30 AM → 12:00 PM Coffee break

12:00 PM → 1:35 PM Clustering phenomena and multi-particle decay

Convener: Rémi Bougault (LPC/ENSI Caen)

12:00 PM From Cluster Phases to alpha, 2-alpha, and Cluster Decay: A Unified Microscopic View of Finite Nuclei

Clustering in finite nuclei is best understood not as an isolated peculiarity of a few light systems, but as a structural and dynamical regime whose signatures run from spectroscopy to decay. In this talk, I will discuss how cluster correlations emerge, evolve, and eventually disappear as nuclei are driven across density- and temperature-controlled regimes, including dilution-induced quantum transitions and thermal effects in finite systems. I will focus on the spectroscopic fingerprints of these regimes, as revealed by microscopic beyond-mean-field and linear-response approaches, and on their extension to collision observables based on ab initio nuclear-structure inputs. I will then show how the same physics reappears on the decay side, through alpha, 2-alpha, and heavier-cluster emission. Altogether, these results point to a unified microscopic picture in which cluster phases, collective excitations, collision imprints, and cluster decay are different manifestations of the same underlying finite-nuclear dynamics.

Speaker: Louis Heitz (CEA)

Heitz_IWMEC_2026.pdf

12:45 PM Nuclei as an Assembly of Fermions and Bosons: RMF Description with Alpha Clusters

It has been shown for several years that cluster states in nuclei could be understood through universal microscopic approaches [1, 2]. Furthermore, starting from a nuclear matter model including clusters, and with a finite nucleus-matter correspondence, it is possible to predict and observe alpha clusters at the surface of Tin isotopes[3]. Here, we present a unified theoretical framework for the study of alpha Clustering in atomic nuclei, following the continuity of both previous works. This framework aims to describe, in a consistent manner, the coexistence between nucleonic and alpha clusters degrees of freedom[4]. The nucleus is modeled as a composite system made of nucleons and alpha clusters.

The dynamics is formulated within a microscopic Many-Body approach, combining an EDF framework for the mediating fields, the nucleons, and the alpha clusters[4]. The resulting set of coupled equations provides a tool to investigate the emergence and stability of clusterized configurations in finite nuclei, as well as their impact on nuclear binding energy, deformations or charge radius.

[1] J.-P. Ebran, E. Khan, T. Nikšić, and D. Vretenar, Nature 487, 341 (2012)
[2] P. Marević, J.-P. Ebran, E. Khan, T. Nikšić, and D. Vretenar, Phys. Rev. C 99, 034317 (2019)
[3] J. Tanaka et al., Science 371, 260 (2021)
[4] S. Typel, G. Röpke, T. Klähn, D. Blaschke, and H. H. Wolter, Phys. Rev. C 81, 015803 (2010)

Speaker: Rodrigue Didier-Pichat (IJCLab)

Nucleus as an assembly of Fermions and bosons (1).pdf

1:10 PM Spinodal instability in nuclear matter with light clusters and in-medium effects

The formation of nuclear clusters, emerging as many-body correlations at sub-saturation densities, constitutes an essential feature for the construction of a reliable Equation of State (EOS). Phenomenological models based on energy density functionals (EDFs) offer a convenient approach to account for these bound states by introducing clusters as additional degrees of freedom (DOF)[1].
In this talk, we present a generalized non-relativistic mean-field framework to include light cluster DOF [2] and investigate the thermodynamical stability of warm, dilute nuclear matter. We characterize the spinodal boundary of isospin-symmetric nuclear matter through the analysis of the curvature matrix of the free-energy density, providing also a comparison with previous results obtained within a linearized dynamical (Vlasov) approach [3].
A key point is the inclusion of in-medium effects for light clusters via a density-dependent infrared momentum cutoff, which effectively accounts for Pauli-blocking and the associated reduction of low-momentum quasiparticle states. We show that the implementation of such a cutoff requires additional rearrangement contributions to the chemical potentials and single-particle energies which significantly modify both the extension of the spinodal region and the nature of unstable modes. In particular, the stiffness of the cutoff’s density dependence drives the phase dynamics: while clusters and nucleons fluctuate in-phase when in-medium effects are neglected, a sufficiently strong density dependence can induce out-of-phase fluctuations, pushing clusters toward low-density regions as instabilities grow. A rich phenomenology further emerges from the competition and mutual coupling between the different cluster species (deuterons and $\alpha$ particles) included in our study.
Our results provide new insights into the multi-faceted nature of the nuclear EOS in the warm, dilute regime, with direct implications for the fragmentation processes in heavy-ion collisions and the physics of neutron-star crusts.

[1] S. Typel, G. Röpke, T. Klähn, D. Blaschke, and H. H. Wolter, Phys. Rev. C 81, 015803 (2010).
[2] S. Burrello, C. Piazza, R. Wang, and M. Colonna, arXiv preprint arXiv:2603.02060 (2026).
[3] R. Wang, S. Burrello, M. Colonna, and F. Matera, Phys. Rev. C 110, L031601 (2024).

Speakers: Carmelo Piazza (Istituto Nazionale di Fisica Nucleare), Carmelo Piazza (INFN - LNS & UniCT)

slide_piazza.pdf

1:35 PM → 2:30 PM Lunch

2:30 PM → 3:40 PM Isospin effects and Symmetry energy in nuclear reactions

Convener: Bao-An Li (East Texas A&M University)

2:30 PM Isospin Effect on Near Barrier Fusion

The effect of $N/Z$ has been probed through different processes such as reactions around the Fermi energy where nuclear dynamics is prominent. Alternatively, the fusion of two nuclei is a process where both the initial structure of the two nuclei and the collision dynamics can play an important role. Light nuclei in particular provide a rich testing ground for the interplay of nuclear structure and dynamics as the relative importance of nuclear structure is large. The availability of isotopic chains of radioactive nuclei, which enables a systematic examination of fusion as a function of neutron number, enables such studies. Recent results from experiments performed at GANIL and FRIB with light and mid-mass nuclei will be explored, including the $N/Z$ effect on cluster emission.

Speaker: Sylvie Hudan (Indiana University)

SHudan_IWMEC2026.pdf

3:15 PM Microscopic tracking of isospin currents and migration dynamics in heavy-ion collisions at Fermi energy

Taking as a reference the system $^{40,48}$Ca$+^{40,48}$Ca at 35 $A$MeV, recently measured at Ganil with the VAMOS-INDRA setup [1], we build a microscopic simulation of neutron and proton currents characterising nuclear systems at Fermi energies.
In particular, we focus on the combination of collective and dissipative processes occurring at midrapidity, related to drifts and fluctuations, and triggered by a sudden density drop.
We further focus on migration, the transport process which is mainly related to density perturbations and neutron-rich environments.
Along the neck, or the low-density thread of matter that forms at midrapidity, we track the evolution of fragment precursors, identified as potential ripples which might eventually emerge as individual nuclear fragments.
We then select situation where the aforementioned precursors induce the breakup of the neck and separate into fragments, possibly carrying experimentally-accessible observables.

The Boltzmann-Langevin One Body approach is well adapted to track inhomogeneity growth in two-component fermionic systems [2], handling both collective motion and dissipative regimes.
For this analysis, we employ a specifically tailored new version of such model [3] which adopts recent SAMi [4] Skyrme interactions, specifically tested on nuclear-matter properties and collective motion in neutron-rich nuclei [5], and a thorough treatment of the momentum-dependent interaction in the mean-field and in the two-body collision contribution.

1. Q.Fable et al. Phys.Rev.C 106 (2022) 024605; Q.Fable et Al., Phys.Rev.C 107 (2022) 014604.
2. P.Napolitani, M.Colonna, Phys.Rev.C 96 (2017) 054609.
3. BLOB-11, to be released in 2026.
4. X.Roca-Maza et al., Phys.Rev.C 86 (2012) 031306R; X.Roca-Maza et Al., Phys.Rev.C 87 (2013) 034301.
5. H.Zheng et Al. Phys.Rev.C 94 (2016) 014313; S.Burrello et Al. Phys.Rev.C 99 (2019) 054314; L.Shvedov et Al. Phys.Rev.C 111 (2025) 014609.

Speaker: Paolo Napolitani (IPN)

talk_Napolitani_Iwm2026.pdf

3:40 PM → 4:10 PM Coffee break

4:10 PM → 6:00 PM Conference opening and special sessions: Challenges in simulating heavy-ion collisions

Convener: Dan Cozma (IFIN-HH)

4:10 PM Introduction and overview

Speakers: Dan Cozma (IFIN-HH), Dan Cozma (IFIN-HH)

4:40 PM Transport model guidelines for Fermi energy studies

Speaker: Arnaud Le Fèvre (GSI Helmholtzzentrum Darmstadt)

IWM-EC2026 transport model round table ALF.pdf

5:10 PM Transport model guidelines for ASYEOS-like studies

Speaker: Paolo Russotto (Istituto Nazionale di Fisica Nucleare)

TM-slides.pptx

Wed, May 27

9:30 AM → 11:05 AM Nuclear dynamics from fission to multi-fragmentation

Convener: Sara Pirrone (Istituto Nazionale di Fisica Nucleare)

9:30 AM Fission studies in inverse kinematics using the SOFIA/R³B experimental setup at the GSI/FAIR facility

The SOFIA/R3B experimental setup at the GSI/FAIR facility (Darmstadt, Germany) is designed to exploit relativistic heavy-ion beams produced at the Fragment Separator (FRS), and in the future at the Super-FRS. These spectrometers deliver intense beams of exotic heavy nuclei, which are used as projectiles in inverse kinematics for fission studies performed with the SOFIA/R3B setup. Building on the pioneering fission experiment carried out at the FRS by K.-H. Schmidt and collaborators, where the identification of the fission fragments was limited to their nuclear charge, the experimental approach has evolved significantly. The present SOFIA/R3B configuration allows for the complete kinematic characterization of the fission process through the simultaneous measurement of the charge, mass, and total kinetic energy of both fission fragments. This is achieved through the use of a double ionization chamber, which provides an excellent charge resolution of ΔZ ≈ 0.34 (FWHM), in combination with tracking detectors and a high-resolution time-of-flight wall (40 ps FWHM), allowing an accurate determination of the fragment trajectories and velocities. Together with the large-acceptance superconducting GLAD dipole magnet, these measurements yield fragment masses with a resolution of about 0.6–0.8 mass units (FWHM), enabling detailed studies of fission-fragment ! yields. This talk will focus on the results obtained from the various SOFIA/R3B fission campaigns at GSI, covering fission induced by Coulex, spallation, and quasi-free (p,2p) reactions. Finally, perspectives and new ideas for future fission experiments at FAIR will be discussed.

Speaker: Jose Luis Rodriguez Sanchez (University of Coruña)

IWM-EC_fission_202605.pdf

10:15 AM Evolution of the reaction dynamics in the 58Ni+58Ni system at Fermi energies.

We present a study of the reaction dynamics of semiperipheral 58Ni+58Ni collisions at 32, 52, and 74 MeV/nucelon through the reconstruction of primary sources and the study of their evolution with centrality and beam energy. The analysis exploits the capabilities of the INDRA–FAZIA apparatus, which combines large angular coverage with excellent isotopic resolution.
After efficiency corrections, evaporative and midvelocity emissions are disentangled, allowing the determination of the size and excitation energy of the primary sources, namely the excited quasi-projectile and the neck. For the first time, this reconstruction is consistently extended to the breakup channel, enabling a direct comparison with the binary one. The results, consistent in both reaction channels, indicate an increasing contribution of midvelocity emission with centrality and beam energy, while its energy density remains nearly constant at about 15–20 MeV/nucleon, significantly higher than that of the primary QP, which remains below 3 MeV/nucleon.
Moreover, the neutron-to-proton ratios of the evaporative and midvelocity components are compared, confirming the neutron enrichment of the neck region and providing insight into the isospin drift as a function of beam energy.

Speaker: Lucia Baldesi (Istituto Nazionale di Fisica Nucleare)

IWM_LB.pptx

10:40 AM Exploring breakup events in 16S+40,48Ca collisions at 17.7AMeV

Experimental data for the systems $^{16}$S+$^{40,48}$Ca at 17.7AMeV, collected with GARFIELD+RCO setup, have been investigated. In particular, the decay of hot sources formed both in highly dissipative binary collisions and in fusion reactions is considered, with a focus on the break up channel, where the light partner of the fission can also be reconstructed via particle correlations. The effect of the isospin diffusion on the QP breakup is investigated too.

Speaker: Silvia Piantelli (Istituto Nazionale di Fisica Nucleare)

csym2026.pdf

11:05 AM → 11:35 AM Coffee break

11:35 AM → 1:15 PM Isospin effects and Symmetry energy in nuclear reactions

Convener: Enrico De Filippo (Istituto Nazionale di Fisica Nucleare)

11:35 AM The ASYEOS II experiment at GSI: Preliminary Results from TOFD-NeuLAND

In March 2025, at the GSI laboratory in Germany, the ASY-EOS II experiment was conducted. The reaction ^{197}Au+^{197}Au was studied at beam energies of 280, 400, 600, and 1000 AMeV. The experiment was designed to investigate high-density nuclear matter and to provide a new and robust constraint on the symmetry energy term of the nuclear equation of state (EoS).
Understanding the behavior of the symmetry energy as a function of density is indeed essential for the interpretation of numerous phenomena, both of nuclear and astrophysical nature. The experimental setup consisted of several detectors; among these, four double rings of the CHIMERA multidetector, transported from the INFN–Laboratori Nazionali del Sud (LNS) to GSI, were employed in combination with the KRAB detector for the reconstruction of the reaction plane and for event centrality selection. Moreover, the experimental setup included the TOFD detector, consisting of two frames: one positioned along the beam direction and one positioned sideways at approximately 50 degrees with respect to it. The first one was used for selecting the reaction centrality through the determination of suitable global variables. The second frame, placed geometrically in
correspondence with the NeuLAND detector, was instead used as a veto for charged particles. NeuLAND, with its 26 planes and a total depth of about 1.3 meters, enabled excellent separation between protons and other hydrogen isotopes. This represents a significant improvement over the previous ASY-EOS experiment.
Thanks to these capabilities, neutron–proton observables, such as the elliptic flows of neutrons and protons, can be determined with high precision. In particular, the ratio of neutron to proton elliptic flows is one of the most sensitive observables to the symmetry energy, up to densities of about 2 \rho_{0} (rho_{0} \sim 0.17 nucleons/fm^{3}). Preliminary results of the data analysis will be presented, with particular focus on the calibration of the TOFD veto and NeuLAND detectors and the discrimination between neutrons and protons/charged particles.

Speakers: Dr Eulalia Gambera, Eulalia Gambera (Istituto Nazionale di Fisica Nucleare), Eulalia Gambera (student at Department of Physics and Astronomy " E. Majorana", University of Catania)

IWM_EC_26_Eulalia_Gambera.pdf

12:00 PM Sensitivity of Collective Flow to Effective Mass of nucleon in Intermediate-Energy Xe + Sn Reactions

The nuclear symmetry energy and its density dependence, particularly above saturation density, remain among the most significant uncertainties in the nuclear equation of state (EoS). These properties play a crucial role in both intermediate-energy heavy-ion collisions and the structure of neutron star matter. Experimental information at supra-saturation densities, however, is still limited, making such collisions a powerful probe of the symmetry energy. In this study, we investigate the $^{129,124}$Xe + $^{124,112}$Sn reactions at 100 MeV per nucleon, measured in 1998 at GSI by the INDRA–ALADIN collaboration. Directed and elliptic flow parameters extracted from the experiment are compared with transport model calculations employing the Improved Quantum Molecular Dynamics (ImQMD) framework. Two Skyrme parameterizations SkM* and Sly4, differing in their treatment of the iso-vector effective mass and neutron–proton effective mass splitting, were implemented in the simulations. By confronting experimental flow observables with theoretical predictions, we assess the sensitivity of collective dynamics to effective mass at supra-saturation densities. Our findings provide new constraints on the density dependence of the symmetry energy in the intermediate-to-high density regime, thereby contributing to a more precise determination of the nuclear EoS.

Speaker: Seon Ho Nam (Korea University)

IWM-EC2026 S.H.Nam.pdf

12:25 PM Isotopic transparency in central Xe+Sn collisions at 100 MeV/nucleon

A new method, based on comparing isotopic yield ratios measured at forward and sideward polar angles and on cross-bombarding heavy nuclei with different neutron-to-proton ratios, is used to quantify the stopping power of nuclear matter in heavy-ion collisions. For central collisions of isotopically separated 124,129Xe+112,124Sn at 100 MeV/nucleon bombarding energy, measured with the 4π multidetector INDRA at GSI, a moderate transparency is deduced for hydrogen isotopes, whereas for heavier fragmentation products with atomic number $Z\geq 3$ a high transparency exceeding 50% is observed. An anomalously large transparency is found for alpha particles, and possible explanations are presented.

Speaker: Arnaud Le Fèvre (GSI Helmholtzzentrum Darmstadt)

ArnaudLeFevre-IWM-EC2026.pdf

12:50 PM Angular Isospin gradient of emitted isotopes from Ar+Ni 74 AMeV collisions

Heavy ion collisions provide a unique laboratory for studying nuclear matter under extreme conditions. The mid-rapidity region, characterized by particles emitted perpendicular to the beam axis, shows experimentally a neutron enrichment. The isospin transport processes and the density-dependent behaviour of the symmetry energy affect the transport of nucleons to this region of interaction between the projectile and the target. Therefore, theoretical models have been employed to characterize the Nuclear Equation of State by comparing the predictions with the experimental data.
The experiment was performed at GANIL (France). An 38Ar beam was accelerated to 74 A MeV and focused on a thin 56Ni target. The reaction products were detected by INDRA and FAZIA multi-detectors.
This paper aims to present the isotopic characteristics of particles and fragments emitted in the forward part of the centre of mass. It will be shown that the N/Z gradient between emissions at mid-velocity and those from the quasi-projectile is more complex than a simple neutron enrichment of all particles detected in the vicinity of the centre of mass.

Speaker: Rémi Bougault (LPC/ENSI Caen)

E818_ArNi_IWMV3.pdf

1:15 PM → 2:30 PM Lunch

3:00 PM → 7:00 PM Social event: Duomo complex guided tour

Thu, May 28

9:30 AM → 11:05 AM Nuclear EOS and multi-messenger astronomy

Convener: Arnaud Le Fèvre (GSI Helmholtzzentrum Darmstadt)

9:30 AM Universal Dense-Matter Trace Anomaly from Collective Flow in Heavy-Ion Collisions and Global properties of Neutron Stars

The trace anomaly of dense matter, $\Delta \equiv 1/3 - P/\varepsilon$, defined in terms of the ratio of pressure $P$ to energy density $\varepsilon$, quantifies deviations from conformal symmetry and plays a central role in both the hydrodynamic response and gravitational equilibrium. While $\Delta(\varepsilon)$ has recently been inferred from neutron star observations, we report the first Bayesian extraction of the trace anomaly from collective flow observables in intermediate-energy heavy-ion collisions at GSI. By employing transport-model simulations that explicitly decouple the cold-matter mean-field potential from thermal effects, we directly constrain the cold dense-matter equation of state (EOS). Remarkably, the trace anomaly inferred from laboratory flow data agrees quantitatively, within $68\%$ credible intervals, with independent astrophysical posterior bands. This nontrivial agreement demonstrates that heavy-ion collisions and neutron star observations probe the same universal macroscopic properties of dense matter, establishing the trace anomaly as a composition-insensitive descriptor
of dense matter across widely different physical environments.

Speaker: Bao-An Li (East Texas A&M University)

Bao-An Li-Florence.pdf

10:15 AM Nuclear response function in dense neutron matter

Neutrino physics is essential for understanding a wide range of astrophysical phenomena. In particular, neutrinos play a fundamental role throughout the entire collapse of a massive star—from the supernova explosion and the early evolution of compact stellar remnants to neutron star cooling and neutron star mergers.

To calculate the opacity of nuclear matter to neutrinos, we employ the formalism developed by Iwamoto and Pethick, extending it beyond the Landau approximation.
Using a multipole expansion, we are able to compute the response function of dense nuclear matter for several families of effective nuclear interactions such as Skyrme, Gogny, and M3Y, including explicit tensor and spin orbit terms.
Following the methodology described in Ref.(Physical Review C—Nuclear Physics 2012, 86, 044308), we then evaluate the neutrino mean free path for different interactions, temperatures and densities of the nuclear medium.
In particular, finite-range interactions that incorporate both spin--orbit and tensor terms have not yet been explored in this context, while previous studies based on Skyrme interactions indicate that these two terms may lead to important reduction of the neutrino mean free path and thus alter the cooling mechanisms.
Using the same nucleon nucleon interaction to describe the various physical aspects of a neutron star will provide more stringent constraint on the determination of the coupling constant of the effective interaction that are also relevant for low energy nuclear physics

Speaker: Daniele Poidomani (CEA)

IWC_EC_Daniele_Poidomani.pdf

10:40 AM Use of a machine learning algorithm to reduce the global computational time for a Bayesian analysis based on the AMD model

A Bayesian analysis aimed at tuning two parameters of the AMD model related to the dynamical cluster formation and the in-medium nucleon-nucleon cross section was performed. The adopted technique required to produce a huge number of time-consuming simulations varying the relevant model parameters. A very preliminary attempt at making the parameter grid more rarefied in order to reduce the global calculation time for the simulation production for the Bayesian analysis by means of a machine learning algorithm is presented.

Speaker: Silvia Piantelli (Istituto Nazionale di Fisica Nucleare)

amd2026.pdf

11:05 AM → 11:30 AM Coffee break

11:30 AM → 1:05 PM New developments in detection techniques and facility

Convener: Giuseppe Politi (Istituto Nazionale di Fisica Nucleare)

11:30 AM Timing characterization of NArCoS Detector

The NarCoS (Neutron Array for Correlation Studies) detector array has been developed for the simultaneous detection of neutrons and charged particles, in particular in heavy-ion collisions involving neutron-rich nuclei. Such measurements are essential for investigating reaction mechanisms and for nuclear spectroscopy studies in which neutron emission plays a central role.
NarCoS is a compact, modular, and highly segmented detection system based on EJ276G plastic scintillators, selected for their excellent neutron–gamma discrimination and detection performance. The array is composed of elementary detection cells of 3 × 3 × 3 cm³, each optically coupled to Silicon PhotoMultipliers (SiPMs). This configuration ensures high neutron detection efficiency together with good angular and energy resolution.
The neutron energy is reconstructed via the time-of-flight technique, making the timing performance of both the detector elements and the readout electronics a critical aspect of the system. The array has been recently employed in the MOReNA (MOlecular states Resolution with NARCOS) experiment, aimed at investigating molecular-like configurations in neutron-rich nuclei through correlation measurements.
In this contribution, we present a detailed characterization of the timing characteristics of the NarCoS array and the preliminary results of the MOReNA experiment.

Speaker: Brunilde Gnoffo

presentazione_Gnoffo.pptx

11:55 AM Present and future of the facility EXOTIC at INFN-LNL

The facility EXOTIC at the Laboratori Nazionali di Legnaro (LNL, Italy) has been in operation for about 20 years for the production of light weakly-bound Radioactive Ion Beams (RIBs), employing two-body inverse kinematics reactions on a cryogenic gas target (e.g. [1,2] and references therein). The installation of the gamma-ray tracking spectrometer AGATA at LNL provided the unique opportunity to study RIB-induced reactions coupling EXOTIC with AGATA.
In this framework, a new event-by-event tracking system, based on two large area position sensitive MCP detectors, has been installed and a new Bayesian Optimizer software to automatically set and adjust the magnetic fields of the ion-optical elements of EXOTIC has been developed. Three RIBs of 11C, 8Li and 7Be were produced, characterized, delivered to the AGATA focal plane with intensities of about 1-2*105 pps and used in the experimental campaign performed between November 2025-March 2026.
In this contribution, after briefly recalling the characteristics of the EXOTIC facility, the results of the commissioning runs, including the performances of the new tracking system, will be presented. Moreover, an overview of the “near-line” results obtained during the three experiments of the EXOTIC-AGATA campaign will be given.
Perspectives on the future use of EXOTIC, possibly with the installation of the SARDA segmented Si telescope array [3] will also be discussed.

[1] M. Mazzocco et al., Nucl. Instr. and Meth B 317, 223, (2013).
[2] S. Pigliapoco et al., Nucl. Phys. A 1057, 123039 (2025).
[3] A. Togni et al, Nucl. Instr. and Meth. A (to be submitted).

Speaker: Dr Anna Togni for the ASFIN and GAMMA collaborations (Istituto Nazionale di Fisica Nucleare)

AnnaTogni_PresentAndFutureOfEXOTIC.pptx

12:20 PM Technique of 20 µm thick transmission detectors for FAZIA quartetto frames

Thin 20 µm n-type silicon was obtained using of selective dissolution n$^+$ - n structures. Obtained thin epitaxial silicon wafers were cut by laser into 21.3 mm X 21.3 mm squares. The thin silicon squares were collimated by 20 mm X 20 mm Al foil windows followed B$^+$ implantation with dose $5\cdot 10^{14}$ ions/cm$^2$ and energy about 50 keV. After that Al contacts were evaporated on both sides of the wafers. The technological process was finished by long time baking with temperature 160 °C. Thin detectors are glued by conductive glue into FAZIA quartetto frames. Contacts between detectors and the track on thin flexible pcb ribbons were performed using thin Cu wires by ultrasonic welding. The E-ΔE spectra of α-particles with energies 6.1 MeV and 8.75 MeV from Th source will be presented.

Speaker: Andrzej Kordyasz (Heavy Ion Laboratory - University of Warsaw)

12:45 PM A user-oriented simulation of ion propagation in layered materials

For decades, physicists have relied on stopping power and range table to study ion-matter interactions. While advanced simulation tools such as SRIM and Geant4 provide detailed modeling of microscopic processes, their compexity often limits accessibility for non-expert users. In this work, we present an application designed to simulate one-dimensional ion propagation through material layers, with a strong emphasis on usability and accessibility. Based on a simplified analytical model, the program provides accurate calculations of key quantities such as stopping power, range or energy loss. The application features interactive plotting, flexible layer and beam configuration and integrated units conversion, making it well-suited for quick calculations or exploratory purposes. This work is conducted within the GANIL SAGA project, which gives space industry partners the capability to test embeded electronic components under high-intensity ion beams, simulating the radiation effects encountered in space environement.

Speaker: Alex Rebillard-Soulié (LPC CAEN)

talk.odp

talk.pdf

1:05 PM → 2:30 PM Lunch