Onset of deformation at $N = 112$ in Bi nuclei
Abstract
The high spin states in Bi has been studied by -ray spectroscopic method using the Ta(Ne, 6n) fusion evaporation reaction at 130 MeV. The coincidence data were taken using an array of 8 clover HPGe detectors. The spin and parity assignments of the excited states have been made from the measured directional correlation from oriented states (DCO) ratios and integrated polarization asymmetry (IPDCO) ratios. The results show, for the first time, the evidence of a rotational like band based on a 13/2 band head in this nucleus, indicating the onset of deformation at neutron number for the Bismuth isotopes. The results obtained were found to be consistent with the prediction of the total Routhian surface calculations using Woods Saxon potential. The same calculations also predict a change in shape from oblate to triaxial in Bi at high rotational frequency.
Keywords
Cite
@article{arxiv.1204.4436,
title = {Onset of deformation at $N = 112$ in Bi nuclei},
author = {H. Pai and G. Mukherjee and R. Raut and S. K. Basu and A. Goswami and S. Chanda and T. Bhattacharjee and S. Bhattacharyya and C. Bhattacharya and S. Bhattacharya and S. R. Banerjee and S. Kundu and K. Banerjee and A. Dey and T. K. Rana and J. K. Meena and D. Gupta and S. Mukhopadhyay and Srijit Bhattacharya and Sudeb Bhattacharya and S. Ganguly and R. Kshetri and M. K. Pradhan},
journal= {arXiv preprint arXiv:1204.4436},
year = {2015}
}