HARIPRAKASH SHARMA^1*, B SETHI¹, P BANERJEE¹, RANJANA GOSWAMI², R K BHANDARI² and JAHAN SINGH³

 ¹ Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700 064, India

² Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India

³ Maharshi Dayanand University, Rohtak 124 001, India

* Present Address: Department of Physics, Kalyani University, Kalyani 741 235, India

Abstract.

Recent experimental data on ¹²⁵I has revealed several interesting structural features. These include the observation of a three quasiparticle band, prolate and oblate deformed bands, signature inversion in the yrast positive-parity band and identification of the unfavoured p h_11/2 band showing very large signature splitting. In the present work, particle-rotor-model calculations have been performed for the p h_11/2  band, using an axially symmetric deformed Nilsson potential. The calculations reproduce the experimental results well and predict a moderate prolate quadrupole deformation of about 0.2 for the band.

Keywords:  Nuclear structure; particle-rotor-model calculations.

Pacs Nos.  27.60.+j; 21.10.Re; 21.60.Ev