High-Spin, Multiparticle Isomers in Sb-121,Sb-123

Jones, G A, Williams, S J, Walker, P M, Podolyak, Z, Zhu, S, Carpenter, M P, Carroll, J J, Chakrawarthy, R S, Chowdhury, P, Cullen, I J, Dracoulis, G D, Garnsworthy, A B, Hackman, G, Janssens, R V, Khoo, T L, Kondev, F G, Lane, G J, Liu, Z, Seweryniak, D and Thompson, N J (2008) High-Spin, Multiparticle Isomers in Sb-121,Sb-123 Physical Review C, 77 (3). ISSN 0556-2813

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Abstract

Isomers in near-spherical Z = 51, antimony isotopes are reported here for the first time using fusion-fission reactions between Al-27 and a pulsed Hf-178 beam of energy, 1150 MeV. gamma rays were observed from the decay of isomeric states with half-lives, T-1/2 = 200(30) and 52(3) mu s, and angular momenta I = (25/2) and I-pi = 23(+)/2, in Sb-121,Sb-123, respectively. These states are proposed to correspond to nu(h(11/2))(2) configurations, coupled to an odd d(5/2) or g(7/2) proton. Nanosecond isomers were also identified at I-pi = 19(-)/2 [T-1/2 = 8.5(5) ns] in Sb-121 and I-pi = (15(-)/2) [T-1/2 = 37(4) ns] in Sb-123. Information on spins and parities of states in these nuclei was obtained using a combination of angular correlation and intensity-balance measurements. The configurations of states in these nuclei are discussed using a combination of spin/energy systematics and shell-model calculations for neighboring tin isotones and antimony isotopes.

Item Type:	Article
Additional Information:	Published in <i>Physical Review C,</i> Vol. 77, Iss. 3. Copyright 2008 American Physical Society. Click <a href=http://prc.aps.org/ >here</a> to access the journal's website.
Divisions:	Faculty of Engineering and Physical Sciences > Physics
Depositing User:	Mr Adam Field
Date Deposited:	27 May 2010 14:05
Last Modified:	23 Sep 2013 18:25
URI:	http://epubs.surrey.ac.uk/id/eprint/36

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