Abstract
Reduced quadrupole transition probabilities for low-lying transitions in neutron-rich are investigated with a recoil distance Doppler shift (RDDS) experiment. The experiment was performed at the Istituto Nazionale di Fisica Nucleare (INFN) Laboratori Nazionali di Legnaro using the Cologne Plunger device for the RDDS technique and the AGATA Demonstrator array for the -ray detection coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In the level lifetime of the yrast state and an upper limit for the lifetime of the state are determined for the first time. The results of are in agreement with previously reported predictions of large-scale shell-model calculations using Ni78-I and Ni78-II effective interactions. In addition, intrinsic shape parameters of lowest yrast states in are calculated. In semimagic level lifetimes of the yrast and states are determined for the first time. Large-scale shell-model calculations using effective interactions Ni78-II, JUN45, jj4b, and jj4pna are performed. The calculations describe and fairly well and point out problems in reproducing the experimental .
2 More- Received 23 November 2015
DOI:https://doi.org/10.1103/PhysRevC.92.064322
©2015 American Physical Society