23-24 May 2011
RIKEN Nishina Center
Asia/Tokyo timezone

Gamma spectroscopy and B(E2) measurements to study shape transitions in neutron rich Mo and Tc isotopes

24 May 2011, 14:05
20m
RIBF Building 2F Conference Room (RIKEN Nishina Center)

RIBF Building 2F Conference Room

RIKEN Nishina Center

2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Speaker

Eiji Ideguchi (CNS, University of Tokyo)

Description

We plan to perform an experiment at the BigRIPS fragment separator at RIKEN to study prolate-oblate shape transitions in neutron rich Mo and Tc nuclides. Existing mean field calculations predict dramatic changes in the ground-state shape in this part of the nuclide chart. To test the validity of the theoretical model framework in the regime, new experimental data in the form of energies of excited states and transition rates are of fundamental importance. Studying shell effects in this region could also shed more light on the astrophysical scenarios along the r-process path. Our proposed experiment aims at, using gamma-ray spectroscopy, measuring B(E2;0+→2+) values in the nuclides 110,112Mo as well as identifying excited states for the first time in A>111 Tc isotopes. CNS GRAPE will be used for gamma-ray measurements and ejectile from the secondary target will be identified by using the ZeroDegree spectrometer.In addition, E(U)RICA spectrometer at final focal plane (F11) will be used to perform life-time measurement of short-lived isomer in these nuclei.

Primary author

Eiji Ideguchi (CNS, University of Tokyo)

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