Excited states have been studied in 35Ar following the 16O(24Mg,1α1n)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.
Unusual Isospin-Breaking and Isospin-Mixing Effects in the A = 35 Mirror Nuclei
LENZI, SILVIA MONICA;
2004
Abstract
Excited states have been studied in 35Ar following the 16O(24Mg,1α1n)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.
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