Coordinatori
Techniques, tools and facilities for nuclear astrophysics
- Zsolt Fulop (ATOMKI)
Techniques, tools and facilities for nuclear astrophysics
- Weiping Liu (China Institute of Atomic Energy)
Techniques, tools and facilities for nuclear astrophysics
- Manoel Couder (University of Notre Dame)
Frank Strieder
(South Dakota School of Mines & Technology)
25/06/18, 16:45
Invited
Even more than 60 years after the groundbreaking publication by Burbidge, Burbidge, Fowler, and Hoyle, Nuclear Astrophysics is still a thriving and exciting research field at the interface of nuclear physics, astro¬physics, and particle physics. An important current topic is associated with the evolution of stars and its impact on the production of heavy elements. The most critical reactions...
Paolo Prati
(Genova University & INFN)
25/06/18, 17:15
Invited
About 25 year ago LUNA (laboratory for Underground Nuclear Astrophysics) opened the era of underground nuclear astrophysics installing a home-made 50 kV ion accelerator under the Gran Sasso mountain. A second machine, with a terminal voltage of 400 kV, was then installed and it is still in operation. Most of the processes so far investigated were connected to the physics of solar neutrinos and...
Raffaele Buompane
(University of Campania)
25/06/18, 17:45
Techniques, tools and facilities for nuclear astrophysics
Oral
7Be(p,gamma)8B still represents one of the major uncertainties on the predicted high energy component of solar neutrino 2ux and it has also a direct impact on the 7Li abundance after the Big Bang Nucleosynthesis. So far, experiments producing data with useful precision were performed in direct kinematics, using an intense proton beam on a radioactive 7Be target. The complicated target...
Rene Reifarth
(Goethe University Frankfurt)
25/06/18, 18:00
Oral
Neutron-induced reactions are relevant for many astrophysical scenarios. The involved isotopes can be stable as during the s-process or radioactive as during the p-, i- or r-process. The different scenarios are characterized by different temperatures and neutron densities. Direct measurements of the relevant cross section are therefore ideally performed for many different energies. The most...
Andreas Best
(Federico II University of Naples & INFN)
25/06/18, 18:15
High precision, low cross section measurements
Oral
The reaction 13C(α,n)16O is the main neutron source in the “s process”, which is responsible for the production of about half of the heavy elements in the universe. It operates in thermally pulsing low mass AGB stars at temperatures of about 90 MK. This translates to a Gamow window between ≈ 140 - 230 keV, far below the Coulomb barrier. Various measurements of the low energy cross section of...
Weiping Liu
(China Institute of Atomic Energy)
25/06/18, 18:30
Oral
Jinping Underground experiment for Nuclear Astrophysics (JUNA) [1] will take the advantage of the ultra-low background of China Jinping Laboratory (CJPL) (rock depth 2400 m) and high current accelerator based on an ECR source and a highly sensitive detector to directly study a number of crucial reactions occurring at their relevant stellar energies during the evolution of hydrostatic stars. In...
Chris Ruiz
(TRIUMF)
26/06/18, 11:00
Invited
Radiative capture reactions are of paramount importance in virtually every astrophysical environment, many of them involving short-lived radionuclides away from stability.
Recoil separators were adapted in order to solve the problem of those hitherto infeasible measurements where the radionuclides of interest are too short-lived to make a target onto which light projectiles could impinge....
Richard deBoer
(University of Notre Dame)
26/06/18, 11:30
Invited
Nearly all stable nuclei reactions have at least a single measurement, and many that are critically important for the modeling of energy generation and nucleosynthesis have been studied several times. This wealth of data is both a blessing and a curse. On the one hand, by combining the results of many different measurements, which have been made in independent ways, one can hope that...
Antonino Di Leva
(INFN Napoli)
26/06/18, 12:00
Oral
The origin of fluorine is a widely debated issue in Nuclear Astrophysics. It is widely recognized that Asymptotic Giant Branch stars are among the most important contributors to the Galactic fluorine production. Various reaction chains may lead to 19F production, however for some α capture re- actions cross sections at astrophysically relevant energies are determined on the basis of some very...
Rosario Pizzone
(INFN - LNS)
26/06/18, 12:15
Invited
The low energy behavior of reactions of astrophysical interest is one of the most important inputs to calculate the reaction rates of astrophysical importance and therefore to evaluate their impact on several astrophysical environments.
Direct measurements in the last decades have given an important contribution to understanding several astrophysical phenomena although they have highlighted...
Christian Iliadias
(University of North Carolina)
27/06/18, 11:30
Invited
Many stellar burning phases are dominated by thermonuclear reactions involving stable nuclei. Prominent examples include hydrostatic hydrogen and helium burning in low-mass stars, massive stars, and thermally pulsing asymptotic giant branch stars.
The nuclear reaction cross sections involved are very small and thus successful measurements require sophisticated equipment and data analysis...
Claudia Lederer-Woods
(University of Edinburgh)
27/06/18, 12:00
Invited
Neutron induced reactions play an important role in the formation of elements heavier than iron. In particular, neutron capture cross sections are a key nuclear physics input to predict abundances produced in the slow neutron capture process (s-process), which is responsible for about half of the heavy element abundances. Stellar models require cross section data on stable isotopes with...
Giovanni Luca Guardo
(INFN - LNS)
27/06/18, 12:30
Oral
The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurele near Bucharest in Romania, will provide high-intensity and high-resolution gamma ray beams that can be used to address hotly debated problems in nuclear astrophysics, such as the accurate measurements of the cross sections of several reactions important for the astrophysical p-process, Big Bang...
Jan Glorius
(GSI Helmholtzzentrum für Schwerionenforschung)
27/06/18, 12:45
Oral
Radiative proton-capture reactions play a crucial role in explosive nucleosynthesis. In the corresponding stellar scenarios, e.g. supernovae or X-ray bursts, the nuclear reaction flow predominantly proceeds in the domain of radioactive nuclei, making reactions studies in the laboratory challenging. The most promising approach to cross section measurements on radionuclides is to prepare them in...
Hidetoshi Yamaguchi
(Center for Nuclear Study, University of Tokyo)
27/06/18, 13:00
Oral
Astrophysical reactions involving radioactive isotopes (RI) are of importance for the stellar energy generation and nucleosynthesis especially in explosive stellar environments, such as X-ray bursts, core-collapse supernovae, big-bang and supermassive metal-poor stars. In spite of the essential difficulties in the experimental evaluation of those reaction rates, there are several successful...
