Beta decay of Neutron-Rich 53-56Ca - Nuclear ExperimentReportar como inadecuado

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Abstract: Beta-decay properties of neutron-rich Ca isotopes have been obtained.Half-life values were determined for the first time for 54Ca 867 ms, 55Ca222 ms, and 56Ca 112 ms. The half-life of 2306 ms deduced for 53Ca issignificantly longer than reported previously, where the decay chain 53K ->53Ca -> 53Sc was considered. A delayed gamma ray with energy 247 keV asidentified following beta decay of 54Ca, and is proposed to depopulate thefirst 1+ level in 54Sc. The beta-decay properties compare favorably with theresults of shell model calculations completed in the full pf-space with theGXPF1 interaction. The half-lives of the neutron-rich Ca isotopes are alsocompared with gross beta-decay theory. The systematic trend of the neutron-richCa half-lives is consistent with the presence of a subshell gap at N=32.

Autor: P.F. Mantica, R. Broda, H.L. Crawford, A. Damaske, B. Fornal, A.A. Hecht, C. Hoffman, M. Horoi, N. Hoteling, R.V.F. Janssens, J.


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