Eur. Phys. J. A (2006) 28: 277-281
https://doi.org/10.1140/epja/i2005-10286-8

Nuclear Structure and Reactions

Loss of collectivity in ⁷⁹Rb

¹ Physics Department, Banaras Hindu University, 221 005, Varanasi, India
² Physics Department, IIT Roorkee, 247 667, Roorkee, India
³ Physics Department, Guru Nanak Dev University, 143 005, Amritsar, India
⁴ Physics Department, Panjab University, 160 014, Chandigarh, India
⁵ HISKP, University of Bonn, Germany
⁶ Inter University Accelerator Centre (formerly known as NSC), 110 067, New Delhi, India
⁷ UGC-DAE Consortium for Scientific Research (formerly known as IUC-DAEF), Kolkata Centre, 700 091, Kolkata, India
⁸ Ramjas College, Delhi University, 110 007, Delhi, India
⁹ Tata Institute of Fundamental Research, 400 005, Mumbai, India

^* e-mail: rishi_india@rediffmail.com

Received: 13 September 2005
Accepted: 3 July 2006
Published online: 20 July 2006

Abstract

High-spin states in ⁷⁹Rb were populated in the reaction at E(beam) = 60 MeV. The lifetimes of the excited states of the positive-parity yrast band and of the negative-parity band in ⁷⁹Rb were measured by the Doppler Shift Attenuation Method. The deduced transition quadrupole moments Q_t are found to have a decreasing trend with rotational frequency for both the bands, consistent with those found experimentally in neighbouring nuclei.