Beta Decay ofS37

Radioactive ${}_{}{}^{37}{}_{}{}^{}\mathrm{S}$ has been prepared by the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$ ($n,p$) ${}_{}{}^{37}{}_{}{}^{}\mathrm{S}$ reaction and its decay products have been observed with a magnetic $\beta$-ray spectrometer and with NaI (Tl) crystal and Ge (Li) crystal $\gamma$-ray spectrometers. The $\beta$-ray groups have endpoint energies, relative intensities, and comparative half-lives of 4.75±0.04 MeV (5.6±0.6)%, $log{f}_{1}t=8.01\mathrm{}$; 1.64±0.04 MeV, 94.0%, $log{f}_{0}t=4.38\mathrm{}$; and 1.04±0.04 MeV, ∼0.4%, $log{f}_{0}t=5.65\mathrm{}$. The $\gamma$ rays have energies and relative intensities of 3.107±0.002 MeV (99.6%) and 3.708±0.004 MeV (∼0.4%). No other $\gamma$ rays were observed; an upper limit of 0.5% is placed on their relative intensity. Coincidence counting places an upper limit of 1% on the possibility of a cascade transition from the 3.107-MeV state of ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$. Spin-parity assignments for ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$ are ${\frac{7}{2}}^{-}$ for the 3.107-MeV state and ${\frac{5}{2}}^{-}$ for the 3.708-MeV state. The ground state of ${}_{}{}^{37}{}_{}{}^{}\mathrm{S}$ has odd parity and probable spin $\frac{7}{2}$.