Elsevier

Nuclear Physics A

Volume 417, Issue 2, 9 April 1984, Pages 269-288
Nuclear Physics A

The l-forbidden Gamow-Teller decay of 39Ca

https://doi.org/10.1016/0375-9474(84)90508-6Get rights and content

Abstract

The intensities of γ-rays emitted following the β+ decays of 39Ca and 35Ar were measured by using a Ge(Li) detector to detect the delayed radiation from a KCl target bombarded by 13 MeV protons. From these results the experimental log (ƒt) values and related B(GT) values for the 35Ar and 39Ca decays are deduced. These are compared with shell-model calculations together with a recent computation by Towner and Khanna of the higher-order corrections due to configuration-mixing outside the sd shell, isobar currents and other meson-exchange currents. We concentrate on the significance of the l-forbidden 1d32 → 2s12 Gamow-Teller transition in mass 39 and comment on its relation to the corresponding M1 transitions in 39Ca and 39K.

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