Shape evolution in ${}^{123}$Cs and ${}^{124}$Ba nuclei

Shape evolution in $^{123}$ Cs and $^{124}$ Ba nuclei

K. Selvakumar, A. K. Singh, Subhashri Das, Purnima Singh, Somnath Nag, A. Gowsami, R. Raut, A. Mukherjee, U. Datta Pramanik, P. Dutta, S. Roy, G. Gangopadhyay, S. Bhowal, S. Muralithar, R. Kumar, R. P. Singh, M. Kumar Raju, and Thomas Reddy

Phys. Rev. C 88, 024313 – Published 16 August 2013

Abstract

Lifetime measurements have been carried out for high spin states in $^{123}$ Cs and $^{124}$ Ba using the Doppler shift attenuation method. The transition quadrupole moments $Q_{t}$ measured in the present work show a loss of collectivity after the alignment of neutron $h_{11 / 2}$ orbitals. The experimental results are compared with the existing theoretical calculations within the framework of the cranked shell model. The results are consistent with the evolution of triaxial shape due to the alignment of $ν h_{11 / 2}$ orbitals. However, larger deformation parameters $β_{2}$ have been measured compared with the values predicted by the model calculations in both the nuclei.

Received 7 May 2013

DOI:https://doi.org/10.1103/PhysRevC.88.024313

Authors & Affiliations

K. Selvakumar, A. K. Singh, Subhashri Das, Purnima Singh^*, and Somnath Nag

Department of Physics and Meteorology, Indian Institute of Technology Kharagpur, IN-721302, India

A. Gowsami, R. Raut^†, A. Mukherjee, and U. Datta Pramanik

Nuclear and Atomic Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, India

P. Dutta

Department of Physics, Ananda Mohan College, Kolkata-700 009, India

S. Roy^‡

S.N. Bose National Centre for Basic Sciences, Kolkata-700 064, India

G. Gangopadhyay

Department of Physics, University College of Science, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India

S. Bhowal

Department of Physics, Surendranath Evening College, 24/2, M. G. Road, Kolkata 700009, India

S. Muralithar, R. Kumar, and R. P. Singh

Inter-University Accelerator Center, Aruna Asaf Ali Marg, New Delhi 110067, India

M. Kumar Raju and Thomas Reddy

Department of Nuclear Physics, Andhra University, Visakhapatnam-530 003, India

^*Present address: Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005, India.
^†Present address: UGC-DAE Consortium for Scientific Research, Kolkata Centre, Kolkata, India.
^‡Present address: KVI, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands.

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Issue

Vol. 88, Iss. 2 — August 2013

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