Nuclear Structure Physics with Advanced Gamma–Detector Arrays (NSP13)

Session

Session 7

Jun 11, 2013, 2:00 PM

Archivio Antico and Aula Nievo (Palazzo del Bo', Padova, Italy)

Conveners

Session 7

• Juergen Gerl (GSI)

41. From GASP to ROSPHERE: Gamma-ray spectroscopy at NIPNE – Bucharest

Dr Dorel Bucurescu (HH IFIN Bucharest)

6/11/13, 2:00 PM

Invited

First, a brief overview of some outstanding results obtained with GASP within the Italian-Romanian collaboration will be given. Then, recent developments for gamma-ray spectroscopy at the Tandem Laboratory in Bucharest are presented. The ROSPHERE (ROmanian array for SPectroscopy in Heavy ion REactions) array, now in use at this laboratory, is a 'sphere' with 25 detector positions. HPGe of ...

42. Gamma Spectroscopy as a Tool to Search for Particle-Phonon Coupled States: Status and Perspectives

Silvia Leoni (University and INFN Milano)

6/11/13, 2:30 PM

Invited

The coupling between a particle and a phonon is a very important issue in nuclear structure studies, being a key process at the origin of the anharmonicities of vibrational spectra, quenching of spectroscopic factors and damping mechanism of giant resonances. The experimental and theoretical investigation of this problem is presented in connection with gamma spectroscopy works on neutron-rich...

17. The 49/2+ Isomer in 147Gd – Study of the most complex isomeric decay

Prof. Rafal Broda (Institute of Nuclear Physics PAN, Krakow, Poland)

6/11/13, 3:00 PM

Oral

The LINAC-ALPI accelerator at LNL and the GASP array were used to perform gamma spectroscopy experiment aimed at two separate goals. The first one was to test the possibility to observe the Coulomb excitation of 147Gd states located above the 49/2 isomer in a secondary scattering of reaction products in the 208Pb catcher. The second goal was to clarify the gamma branching in the earlier...

28. Lifetime measurements by Doppler methods with the RoSphere array

Constantin Mihai (HH IFIN Bucharest)

6/11/13, 3:20 PM

Oral

The Doppler techniques ( DSAM- Doppler Shift Attenuation Method and RDDS Recoil Distance Doppler Shift) are widely used gamma-ray spectroscopy techniques aimed at measuring the lifetime of excited nuclear states by using the Doppler shift of the de-exciting gamma-ray transition as a stopwatch. The RoSphere setup installed at the Bucharest TANDEM was used for lifetime measurements by the DSAM...

6. The continuous-angle Doppler-shift attenuation method – sub-picosecond lifetime measurements with position-sensitive HPGe detector arrays

Mr Christian Stahl (IKP, TU Darmstadt)

6/11/13, 3:40 PM

Oral

The Doppler-shift attenuation method (DSAM) is a well-established technique for the determination of sub-picosecond nuclear level lifetimes. It is based on analyzing the characteristic shape of Doppler-broadened photo-peaks from nuclear transitions observed at specific observation angles in in-flight γ-ray spectroscopy experiments, when the de-excitation of a nuclear level occurs while the...

43. Collectivity in neutron-rich Co and Mn isotopes going towards N = 40

Dr Victor Modamio Hoybjor (LNL)

6/11/13, 3:55 PM

In the last decade, a large experimental an theoretical effort has been devoted to the study of the sub-shell closure N = 40 and the evolution of the magic number N = 50 for the Ni isotopic chain. Meanwhile the N = 50 78Ni excited states represent still nowadays an experimental challenge, the evolution of the sub-shell closure at N = 40, when taking away protons from the Ni core, has been...