Isospin-Forbidden Decay Properties of the Lowest T=2 States of 20Ne, 24Mg, 28Si, 32S, and 40Ca

Details Isospin-Forbidden Decay Properties of the Lowest T=2 States of 20Ne, 24Mg, 28Si, 32S, and 40Ca Isospin-Forbidden Decay Properties of the Lowest T=2 States of 20Ne, 24Mg, 28Si, 32S, and 40Ca

Jan 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970phrvc...1..184m&link_type=abstract

Physical Review C, vol. 1, Issue 1, pp. 184-192

Physics

12

Scientific paper

The lowest T=2 states of 20Ne, 24Mg, 28Si, 32S, and 40Ca have been formed using the (p, t) reaction. The isospin-forbidden proton (ΔT=1 or 2) and α-particle (ΔT=2) decay modes of these states have been determined by counting triton-proton and triton-α coincidence events. The major decay modes of the states are 20Ne(α1+α2, α3+α4), 24Mg(p0), 28Si(α0), 32S(p0), 40Ca(α0). Simple Coulomb calculations were performed for 40Ca; these assumed pure shell-model configurations and considered isospin mixing in only the (1d, 1f) shells. They did not predict the relatively large ΔT=2 isospin impurities necessary to explain the observed α-particle decay.

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