Band structures of the 123Cs nucleus

Kuljeet Singh; J. Goswamy; D. Mehta; Nirmal Singh; R. P. Singh; S. Muralithar; E. S. Paul; K. P. Singh; N. Madhavan; J. J. Das; S. Nath; A. Jhingan; P. Sughathan; R. K. Bhowmik

doi:10.1140/epja/i2004-10064-2

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
qt
am
n

2023 Impact factor 2.6

Hadrons and Nuclei

Open Access

Eur. Phys. J. A (2004) 21: 359-363
https://doi.org/10.1140/epja/i2004-10064-2

Letter

Band structures of the ¹²³Cs nucleus

Kuljeet Singh¹, J. Goswamy¹, D. Mehta¹, Nirmal Singh¹^*, R. P. Singh², S. Muralithar², E. S. Paul³, K. P. Singh¹, N. Madhavan², J. J. Das², S. Nath², A. Jhingan², P. Sughathan² and R. K. Bhowmik²

¹ Department of Physics, Panjab University, 160 014, Chandigarh, India
² Nuclear Science Centre, Aruna Asaf Ali Marg, 110 067, New Delhi, India
³ Oliver Lodge Laboratory, University of Liverpool, L69 7ZE, UK

^* e-mail: nsingh@pu.ac.in

Abstract

Band structures of the ¹²³Cs nucleus have been investigated using the ¹⁰⁰Mo(²⁸Si, p4n) reaction at a beam energy of 130 MeV. The previously observed rotational bands based on $\ensuremath{\pi}$ h _11/2, $\ensuremath{\pi}$ g _7/2 and $\ensuremath{\pi}$ g _9/2 orbitals have been extended. The excitation energies of these bands have been established with the help of interband transitions and those connecting to the low-energy levels established from the $\ensuremath{\beta}$ ⁺/EC decay of ¹²³Ba (T _1/2 = 2.7 m). The bandhead of the $\ensuremath{\pi}$ g _9/2 band at the 328.1 keV ( $I^{\ensuremath{\pi}} = 9/2^{ + }$ ) is proposed to be isomeric following arguments based on the intensity balance of the feeding and de-exciting $\ensuremath{\gamma}$ transitions. New multiquasiparticle bands based on $\ensuremath{\pi}$ $h_{11/2}\otimes \ensuremath{\nu}h_{11/2} \otimes \nu g_{7/2}$ , $\ensuremath{\pi}$ $g_{7/2} \otimes \pi(h_{11/2})^{2}$ and $\ensuremath{\pi}$ $g_{7/2} \otimes \pi (h_{11/2})^{2} \otimes \nu(h_{11/2})^{2}$ configurations have been identified.