Elsevier

Nuclear Physics A

Volume 615, Issue 1, 17 March 1997, Pages 52-68
Nuclear Physics A

The spectroscopy of 22Al: a βp, β2p and βα emitter

https://doi.org/10.1016/S0375-9474(96)00483-6Get rights and content

Abstract

In an experiment at the LISE3 facility of GANIL, we produced the proton-rich isotope 22Al by the fragmentation of a 36Ar primary beam at 95 MeV/nucleon. After implantation in a detector telescope, the decay of 22Al via β-delayed proton emission, β-delayed two-proton emission as well as, for the first time, via β-delayed α emission has been studied. An α peak has been observed at (3.27 ± 0.04) MeV with a branching ratio of (0.31 ± 0.09) %. The comparison of the different decay channels to those of the mirror nucleus 22F and to shell-model calculations favor a 3+ state as being the ground state of 22Al. A half life of T1/2 = (59 ± 3) ms has been measured.

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