High-spin spectroscopy of Ga-63(31)32 and Ga-65(31)34

Citation
M. Weiszflog et al., High-spin spectroscopy of Ga-63(31)32 and Ga-65(31)34, EUR PHY J A, 11(1), 2001, pp. 25-38
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL A
ISSN journal
1434-6001 → ACNP
Volume
11
Issue
1
Year of publication
2001
Pages
25 - 38
Database
ISI
SICI code
1434-6001(200105)11:1<25:HSOGAG>2.0.ZU;2-W
Abstract
High-spin states in the nuclei Ga-63 and Ga-65 were studied following the r eaction S-32 + Ca-40 at a reaction energy of 125 MeV and using the GASP gam ma -ray spectrometer in combination with the ISIS charged-particle detector system. In addition to low-lying negative-parity states with single-partic le character, rotational-like cascades built on the 9/2(+) and 19/2(-) stat es have been observed in both nuclei. Sidebands with negative parity in Ga- 63 and positive parity in Ga-65 could be established. The experimental resu lts are compared with Total Routhian Surface calculations which describe th e nuclei as moderately deformed (beta (2) approximate to 0.25) and gamma so ft at low rotational frequencies. The highest experimentally observed posit ive-parity state in Ga-65 (41/2(+)) is in good agreement with the calculate d crossing of the collective band with a non-collective one terminating at this spin.