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Spectroscopy on the proton drip-line: Probing the structure dependence of isospin nonconserving interactions

Autor Henderson, J.; Jenkins, D.G.; Kaneko, K.; Ruotsalainen, P.; Sarriguren, Pedro ; Wadsworth, R.; Zieliń ska, M.
Fecha de publicación 2014
EditorAmerican Physical Society
Citación Physical Review C - Nuclear Physics 90: 051303(R) (2014)
Resumen© 2014 American Physical Society. The recoil-β tagging technique was used to identify transitions associated with the decay of the 2+ and, tentatively, the 4+ excited states in Sr74. Combining these results with published data for the A=74 isobars, triplet energy differences (TEDs) have been extracted, the heaviest case for which these values have been evaluated. State-of-the-art shell-model calculations using the JUN45 interaction and incorporating a J=0 isospin nonconserving (INC) interaction with an isotensor strength of 100 keV can reproduce the trend in the TED data, with particularly good agreement for the 2+ state. This agreement for the TED data taken together with the fact that agreement has also been shown between shell-model calculations with the same strength of INC interaction in the f7/2 shell and recently for A=66 strongly suggests that such an interaction exists throughout the nuclear chart and cannot have a strong dependence on details of nuclear structure such as which nuclear orbitals are occupied. It also supports the hypothesis that only a J=0 component of the INC interaction need be included to explain the observed TEDs.
Descripción J. Henderson et al. ; 4 pags. ; 4 figs. ; PACS number(s): 21.10.Re, 21.60.Cs, 23.20.Lv, 27.50.+e
URI http://hdl.handle.net/10261/110711
Identificadoresdoi: 10.1103/PhysRevC.90.051303
issn: 1089-490X
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