Unusual isospin-breaking and isospin-mixing effects in the A=35 mirror nuclei

Excited states have been studied in 35Ar following the 16O(24Mg,1alpha1n)35Ar fusion-evaporation reaction at 60 MeV using the Ge-detector array GASP. A comparison with the mirror nucleus 35Cl shows two remarkable features: (i) A surprisingly large energy difference for the 13/2(-) states, in which t...

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Published inPhysical review letters Vol. 92; no. 13; p. 132502
Main Authors Ekman, J, Rudolph, D, Fahlander, C, Zuker, A P, Bentley, M A, Lenzi, S M, Andreoiu, C, Axiotis, M, de Angelis, G, Farnea, E, Gadea, A, Kröll, Th, Mărginean, N, Martinez, T, Mineva, M N, Rossi-Alvarez, C, Ur, C A
Format Journal Article
LanguageEnglish
Published United States 02.04.2004
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Summary:Excited states have been studied in 35Ar following the 16O(24Mg,1alpha1n)35Ar fusion-evaporation reaction at 60 MeV using the Ge-detector array GASP. A comparison with the mirror nucleus 35Cl shows two remarkable features: (i) A surprisingly large energy difference for the 13/2(-) states, in which the hitherto overlooked electromagnetic spin-orbit term is shown to play a major role, and (ii) a very different decay pattern for the 7/2(-) states, which provides direct evidence of isospin mixing.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.92.132502