$\gamma$ rays following the $\beta$ decay of ${}_{}{}^{37}{}_{}{}^{}\mathrm{S}$ have been observed with a Ge(Li) detector during the course of a study of the decay modes of ${}_{}{}^{40}{}_{}{}^{}\mathrm{Cl}$. These two isotopes have been produced simultaneously through the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}(n,\alpha )$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}\mathrm{}(n,p)\mathrm{}$ reactions. The energies and relative intensities of the two lines (3103.3 ± 0.3 keV, 99.7% and 3741.8 ± 0.4 keV, 0.3%) measured earlier in this laboratory using the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}\mathrm{}(n,p)\mathrm{}{}_{}{}^{37}{}_{}{}^{}\mathrm{S}$ reaction, are confirmed. No transition with the energy of 3706 ± 2 keV and the decay rate of ${}_{}{}^{37}{}_{}{}^{}\mathrm{S}$ has been found. Nevertheless, a $\gamma$ ray of 3704.6 ± 0.8 keV is shown clearly to arise from the deexcitation of ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$.

• Received 18 September 1972

DOI:https://doi.org/10.1103/PhysRevC.7.854