Elsevier

Nuclear Physics A

Volume 431, Issue 2, 17 December 1984, Pages 301-316
Nuclear Physics A

The 19F(p, n)19Ne and 39K(p, n)39Ca reactions at intermediate energies and quenching of the Gamow-Teller strength

https://doi.org/10.1016/0375-9474(84)90177-5Get rights and content

Abstract

The (p, n) reactions on 19F and 39K targets have been studied at 120 MeV and 160 MeV using the Indiana University Cyclotron time-of-flight facility. States up to 12 MeV excitation energy have been observed and angular distributions for these neutron groups are presented. The ground-state mirror transitions have accurately measured ft values. This information is used to normalize the zero-degree energy spectra to a scale of Gamow-Teller (GT) transition probability to obtain GT strenghts to excited states. The experimental sum GT strengths are smaller than the sum-rule-limit values showing strong evidence for GT quenching.

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