20–25 May 2012
Centro Congressi delle Venezie, Hotel Alexander Palace - Abano Terme (Padova) - Italy
Europe/Rome timezone
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Hindered proton collectivity in the proton-rich nucleus 28S

25 May 2012, 12:10
20m
Centro Congressi delle Venezie, Hotel Alexander Palace - Abano Terme (Padova) - Italy

Centro Congressi delle Venezie, Hotel Alexander Palace - Abano Terme (Padova) - Italy

Via Martiri D'Ungheria, 24 35031 Abano Terme (Padova) ph. +39.049.8615111 Fax +39.049.8615199
Oral Nuclear structure far from stability Nuclear Structure far from Stability

Speaker

Dr Yasuhiro Togano (EMMI, GSI)

Description

The reduced transition probability B(E2) of the 0+ → 2+ transition in 28S was determined experimentally using the Coulomb excitation at 53 MeV/nucleon. The experiment was performed using the RI Beam Factory at RIKEN Nishina Center. The resultant B(E2) value is smaller than the expectation based on an empirical B(E2) systematics. The relative importance of the proton- and neutron- collectivities in the transition is evaluated using the ratio of the neutron/proton transition matrix elements (Mn/Mp) obtained from the present B(E2) value for 28S and the known one for the mirror nucleus 28Mg. The obtained Mn/Mp ratio is much larger than N/Z ratio of 28S, indicating the neutron dominance in the transition and the hindered proton collectivity relative to that of neutrons. These result could be the emergence of Z=16 magicity in the |Tz|=2 nucleus 28S.

Primary author

Dr Yasuhiro Togano (EMMI, GSI)

Co-authors

Dr D. Fang (Shanghai Institute of Applied Physics) Dr H. Baba (RIKEN Nishina Center) Dr H. Murakami (RIKEN Nishina Center) Dr H. Wang (Shanghai Institute of Applied Physics) Dr J. Wang (Institute of Modern Physics) Prof. K. Ieki (Department of Physics, Rikkyo University) Prof. K. Kurita (Department of Physics, Rikkyo University) Mrs K. N. Tanaka (Department of Physics, Tokyo Institute of Technology) Mr K. Okada (Department of Physics, Rikkyo University) Dr K. Yamada (RIKEN Nishina Center) Dr K. Yoneda (RIKEN Nishina Center) Dr M. Kurokawa (RIKEN Nishina Center) Mr M. Matsushita (Department of Physics, Rikkyo University) Prof. N. Aoi (RIKEN Nishina Center) Prof. N. Iwasa (Department of Physics, Tohoku University) Mr N. Kobayashi (Department of Physics, Tokyo Institute of Technology) Mr N. Kume (Department of Physics, Tohoku University) Dr P. Doornenbal (RIKEN Nishina Center) Mr R. Shioda (Department of Physics, Rikkyo University) Prof. S. Bishop (RIKEN Nishina Center) Dr S. Kanno (RIKEN Nishina Center) Dr S. Ota (CNS, University of Tokyo) Prof. S. Shimoura (CNS, University of Tokyo) Dr S. Takeuchi (RIKEN Nishina Center) Dr T. Furukawa (RIKEN Nishina Center) Prof. T. Kawabata (CNS, University of Tokyo) Dr T. Kuboki (Department of Physics, Saitama University) Dr T. Motobayashi (RIKEN Nishina Center) Prof. T. Nakamura (Department of Physics, Tokyo Institute of Technology) Dr W. Tian (Shanghai Institute of Applied Physics) Dr X. Cai (Shanghai Institute of Applied Physics) Prof. Y. G. Ma (Shanghai Institute of Applied Physics) Dr Y. Kondo (RIKEN Nishina Center) Dr Y. Matsuo (RIKEN Nishina Center) Prof. Y. Satou (Department of Physics, Tokyo Institute of Technology) Mr Y. Yamada (Department of Physics, Rikkyo University)

Presentation materials