Observation of strong isospin mixing in proton emission from the astrophysically interesting isobaric analog state inMg23

1 November 1995

journal article
Published by American Physical Society (APS) in Physical Review C

Vol. 52 (5) , R2298-R2301
https://doi.org/10.1103/physrevc.52.r2298

Abstract

Utilizing the Mg24(p, 2n) reaction and unique particle telescopes, beta-delayed proton emission from Al23 proceeding via its isobaric analog state in Mg23 has been observed. The relevant proton group was detected at 223±20 keV with a proton decay branching ratio of 3.5±1.9%. The proton width determined for this state is approximately an order of magnitude larger than that predicted by a full-basis 1s−0d shell model calculation which includes the expected isospin mixing. In addition, the resulting resonance strength (45±25 meV) has important astrophysical implications.

Keywords

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