2013/08/01 by Rajashri Bhattacherjee, Krishichayan, Bhattacherjee, Rajashri +50
Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #nucl-ex
paper · pdf · doi:10.48550/arxiv.1308.0119
29 pages, including 11 figures. Communicated to Physical Review C
arxiv created 2013/08/01 · arxiv updated 2013/08/02
A γ-ray linear polarization measurement has been performed to directly determine the parities for the levels in 146Gd nucleus. High-spin states in this nucleus were populated in a reaction 115In + 34S at 140 MeV incident energy. Linearly polarized γ - rays emitted from oriented states were measured using a Compton polarimeter consisting of an array of 8 Compton-suppressed Clover detectors. Unambiguous assignments of the spin and parity have been made for most of the observed levels and changes made in the previously reported spin-parity assignments for a few levels. Shell model calculations performed with judicious truncation over the π(gdsh) valence space interpret the structure of only the low-lying levels up to Jπ = 19+ and 9-. N = 82 neutron-core breaking is found to be essential for high spin states with excitation energies Ex > 7 MeV.