Elsevier

Nuclear Physics A

Volume 234, Issue 1, 25 November 1974, Pages 130-156
Nuclear Physics A

High-resolution measurements of beta-delayed protons from 37Ca and 41Ti

https://doi.org/10.1016/0375-9474(74)90383-2Get rights and content

Abstract

Protons with energies from 870 keV to 5.4 MeV have been observed following bombardment of a 40Ca target with 3He at beam energies of 29.5, 36.5 and 60 MeV, as well as from 40 MeV 3He bombardment of an 36Ar gas target. These data, and those resulting from 20 MeV proton bombardment of 40Ca, permit accurate identification of proton unbound levels in 41Sc, 37K, and 40Ca fed by allowed beta decay from 41Ti, 37Ca or 40Sc, respectively. Absolute ft values have been determined for beta decay to these levels. The half-life of 41Ti has been remeasured to be 80±2 ms and the log ft for its superallowed decay branch has been found to be 3.35±0.02, indicating an isospin purity for the lowest T = 32state in41Sc of ≈ 91 %. The ft values for37Ca β+ decay are compared to shell-model calculations for beta-decay in A = 37 nuclei.

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    Work performed under the auspices of the US Atomic Energy Commission.

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