Half-life and Ft value of the superallowed positron decay of 38 K m
2000; American Institute of Physics; Volume: 62; Issue: 5 Linguagem: Inglês
10.1103/physrevc.62.054302
ISSN1538-4497
Autores Tópico(s)Muon and positron interactions and applications
ResumoThe measurement of the half-life of the superallowed positron decay of ${}^{38}{\mathrm{K}}^{m}$ has been studied with particular reference to possible systematic effects involved. A value of 924.4(6) ms has been found. A recommendation is made that certain earlier values are rejected, and that a mean lifetime of 924.24(27) ms is accepted. This leads to an $\mathrm{Ft}$ value of 3071.8(19) s, where the overwhelming contribution to the error comes from uncertainties in the electromagnetic corrections.
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