Eur. Phys. J. A (2005) 24: 173-178
https://doi.org/10.1140/epja/i2004-10147-0

Original Article

Levels in doubly odd ¹³⁸Pr

¹ Department of Physics, University College of Science, University of Calcutta, 700009, Kolkata, India
² Department of Physics, Surendranath Evening College, 24/2 M.G. Road, 700009, Kolkata, India
³ Nuclear Science Centre, 110067, New Delhi, India
⁴ Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, 700064, Kolkata, India
⁵ Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India
⁶ Dipartimento di Fisica and INFN, Sezione di Perugia, Università di Camerino, Via Madonna delle Carceri 9, I-62032 Camerino (PG), Italy
⁷ Department of Physics, Indian Institute of Technology, 721302, Kharagpur, India

^* e-mail: gautam@cucc.ernet.in

Received: 6 May 2004
Accepted: 12 March 2005
Published online: 12 April 2005

Abstract

The band structures of the doubly odd ¹³⁸Pr nucleus have been investigated using the ¹²⁸Te(¹⁴N, 4n)¹³⁸Pr reaction at a beam energy of 55-65 MeV. Altogether six distinct structures have been established, of which the lower part of the yrast band and two side bands were known from earlier works. The observed level properties of the members of the yrast band have been compared with theoretical calculations performed within the Particle Rotor Model (PRM) with axially symmetric core. The experimental branching ratios and B(M1)/B(E2) values when compared with the theoretical results of the PRM, suggest an oblate core.