Identification of excited states in 140Dy

Cullen, D.M., Carpenter, M.P., Davids, C.N., Fletcher, A.M., Freeman, S.J., Janssens, R.V.F., Kondev, F.G., Lister, C.J., Pattison, L.K., Seweryniak, D., Smith, J.F., Bruce, A.M., Abu Saleem, K., Ahmad, I., Heinz, A., Khoo, T.L., Moore, E.F., Mukherjee, G., Wheldon, C. and Woehr, A. (2002) Identification of excited states in 140Dy Physics letters B, 529 (1-5). pp. 42-49. ISSN 0370-2693

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Abstract

Excited structures in the proton-rich nucleus 140Dy have been established following the decay of an 8− isomer. The excitation energy of the isomer is established to be 2.16 MeV with a half-life of 7.3±1.5 μs. The isomer decays into the yrast line at the 8+ state, revealing a rotational band with a deduced deformation of β2=0.24(3). The isotope 140Dy is the daughter of the deformed proton emitter 141Ho. The new information obtained here supports the role of deformation in proton emission and the previous assignments of single-particle configurations to the two proton emitting states in 141Ho. In addition, the reduced hindrance factor measured for the isomer is consistent with the trend observed in the N=74 isotones.

Item Type: Journal article
Subjects: F000 Physical Sciences > F300 Physics
DOI (a stable link to the resource): 10.1016/S0370-2693(02)01222-4
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: 11 Dec 2006
Last Modified: 21 May 2012 11:04
URI: http://eprints.brighton.ac.uk/id/eprint/1450

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