High spin structure in 130,131Ba

Navneet Kaur; A. Kumar; G. Mukherjee; Amandeep Singh; S. Kumar; Rajbir Kaur; Varinderjit Singh; B. R. Behera; K. P. Singh; G. Singh; H. P. Sharma; Suresh Kumar; M. Kumar Raju; P. V. Madhusudhan Rao; S. Muralithar; R. P. Singh; Rakesh Kumar; N. Madhvan; R. K. Bhowmik

doi:10.1140/epja/i2014-14005-2

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A (2014) 50: 5
https://doi.org/10.1140/epja/i2014-14005-2

Regular Article - Experimental Physics

High spin structure in ^130,131Ba

Navneet Kaur¹, A. Kumar¹, G. Mukherjee², Amandeep Singh¹, S. Kumar¹, Rajbir Kaur¹, Varinderjit Singh¹, B. R. Behera¹, K. P. Singh¹, G. Singh¹, H. P. Sharma³, Suresh Kumar⁴, M. Kumar Raju⁵, P. V. Madhusudhan Rao⁵, S. Muralithar⁶, R. P. Singh⁶, Rakesh Kumar⁶, N. Madhvan⁶ and R. K. Bhowmik⁶

¹ Department of Physics, Panjab University, 160014, Chandigarh, India
² Variable Energy Cyclotron Centre, 700064, Kolkata, India
³ Department of Physics, Banaras Hindu University, 221005, Varanasi, India
⁴ Department of Physics and Astrophysics, Delhi University, 110007, Delhi, India
⁵ Department of Nuclear Physics, Andhra University, 530003, Vishakapatnam, India
⁶ Inter University Accelrator Centre, Aruna Asaf Ali Marg, 110067, New Delhi, India

Received: 18 May 2013
Revised: 20 December 2013
Accepted: 24 December 2013
Published online: 23 January 2014

Abstract

High spin states of ^130,131Ba have been investigated via fusion evaporation reactions ¹²²Sn(¹³C,4n)¹³¹Ba and ¹²²Sn(¹³C, 5n)¹³⁰Ba at MeV. The level schemes of ^130,131Ba have been extended by placing several new transitions. A few interband transitions connecting two negative-parity bands, which are the experimental fingerprints of signature partners, have been established in ¹³⁰Ba. Spin and parity of a side band have been assigned in ¹³¹Ba and this dipole band is proposed to have a three-quasiparticle configuration, . The observed band structures and nuclear shape evolution as a function of the angular momentum have been discussed in the light of Total-Routhian-Surface calculations.