Eur. Phys. J. A (2019) 55: 163
https://doi.org/10.1140/epja/i2019-12842-y

Regular Article - Experimental Physics

Observation of quasi- bands in Te nuclei

¹ Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, India
² Department of Physics, S P College, Srinagar, India
³ Cluster University, Srinagar, Jammu and Kashmir, India
⁴ Department of Physics, University of Kashmir, Srinagar, India
⁵ Saha Institute of Nuclear Physics, Kolkata, India
⁶ Department of Physics, Bethune College, Kolkata, India
⁷ Department of Physics, Visva-Bharati, Santiniketan, India
⁸ Department of Physics, Indian Institute of Technology, Roorkee, India
⁹ Amity Institute of Nuclear Science and Technology, Amity University, Noida, India
¹⁰ Department of Physics and Astrophysics, University of Delhi, New Delhi, India
¹¹ Department of Physics, Panjab University, Chandigarh, India
¹² Inter-University Accelerator Centre, New Delhi, India

^* e-mail: hpsharma_07@yahoo.com

Received: 11 March 2019
Accepted: 30 July 2019
Published online: 27 September 2019

Abstract

Excited states of ¹²⁴Te have been studied via ¹²²Sn(⁹Be,3n)¹²⁴Te reaction at 48MeV. The spin and parity of several states have been confirmed on the basis of results of angular correlation ( and linear polarization asymmetry measurements. The positive parity band structures of ¹²⁴Te and ¹²⁶Te have been investigated and the quasi- bands have been proposed in these nuclei. The structures of these bands have also been discussed under the framework of triaxial projected shell model (TPSM) calculations. The TPSM calculations fairly supported the interpretation of quasi- bands in ¹²⁴Te and ¹²⁶Te. The staggering pattern of odd-even spin states of the quasi- band suggests the -soft behaviour of ¹²⁴Te and the typical values of staggering factors indicate the presence of the E(5)-critical point symmetry in ¹²⁴Te. The potential energy surface calculations have also been carried out for ¹²⁴Te and ¹²⁶Te, which also supports the -soft behaviour for these nuclei.