Band structure of 79Br

✍ Scribed by I. Ray; P. Banerjee; S. Bhattacharya; M. Saha-Sarkar; B. Sethi; J.M. Chatterjee; S. Chattopadhyay; A. Goswami; S. Muralithar; R.P. Singh; R.K. Bhowmik

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 1005 KB
• Volume: 646
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(98)00589-2

✦ Synopsis

High-spin states of 79Br have been studied in the reaction 76Ge(TLi, 4n~) at 32 MeV. A gammadetector array with twelve Compton-suppressed HPGe detectors was used. The positive-parity yrast states, interpreted as a rotationally aligned g9/2 proton band, and the negative-parity ground state band have been extended to spins of (33/:2 + ) and (25/2-), respectively. Lifetime measurements indicate that both bands have a similar quadmpole deformation of/32 ~ 0.2. The positive-parity a = -½ band has been identified. Several new inter-band transitions are observed. A crankedshell model analysis shows that the ugg/2 and ~fgg/2 alignments occur in the positive-parity and the negative-parity bands at rotational frequencies of hw ~ 0.6 and 0.4 MeV, respectively. The level energies and the electromagnetic properties of the g9/2 band can be well reproduced by a particle-rotor model calculation with an axially symmetric core. @ 1999 Elsevier Science B.V.