Fermi superallowed β+ decays and T=1 ground states of heavy odd-odd N=Z nuclei

Garcés Narro, J., Longour, C., Regan, P.H., Blank, B., Pearson, C.J., Lewitowicz, M., Miehé, C., Gelletly, W., Appelbe, D., Axelsson, L., Bruce, A.M., Catford, W.N., Chandler, C., Clark, R.M., Cullen, D.M., Czajkowski, S., Daugas, J.M., Dessagne, P., Fleury, A., Frankland, L., Giovinazzo, J,, Greenhalgh, B., Grzywacz, R., Harder, M., Jones, K.L., Kelsall, N., Kszczot, T., Page, R.D., Reed, A.T., Sorlin, O. and Wadsworth, R. (2001) Fermi superallowed β+ decays and T=1 ground states of heavy odd-odd N=Z nuclei Physical review C, 63 (4). ISSN 0556-2813

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Abstract

The β+-decay half-lives of the neutron-deficient odd-odd N=Z nuclei 74Rb, 78Y, 82Nb, and 86Tc have been measured following the fragmentation of a primary 92Mo beam at an energy of 60 MeV per nucleon at the GANIL laboratory, France. This was achieved by correlating β+ decays with the implantation of unambiguously identified fragments at the final focus of the LISE3 separator. The deduced log10 ft1/2 values are consistent with 0+→0+, Fermi superallowed transitions, which together with the measured β+-detection efficiencies, suggest T=1, Iπ=0+ ground states for these odd-odd N=Z nuclei. These data represent the heaviest N=Z systems for which Fermi superallowed decays have been established.

Item Type: Journal article
Additional Information: Copyright American Physical Society
Subjects: F000 Physical Sciences > F300 Physics
DOI (a stable link to the resource): 10.1103/PhysRevC.63.044307
Faculties: Faculty of Science and Engineering > School of Computing, Engineering and Mathematics > Engineering and Product Design Research > Nuclear Physics
Depositing User: editor engineering
Date Deposited: 19 Jan 2007
Last Modified: 21 May 2012 11:07
URI: http://eprints.brighton.ac.uk/id/eprint/1472

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