The ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$,$2n$) reaction at 32 MeV has been used to produce ${}_{}{}^{29}{}_{}{}^{}\mathrm{S}$; delayed protons have been observed following the positron decay of ${}_{}{}^{29}{}_{}{}^{}\mathrm{S}$ to proton unbound levels in ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$. The half-life of ${}_{}{}^{29}{}_{}{}^{}\mathrm{S}$ was measured to be 187±6 ms which, combined with previous results, gives a weighted average value of 188.0±4.3 ms. Precise level energies have confirmed several recently observed states in ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$ from 4.0 to 9.5 MeV in excitation energy. From the intensities of these proton groups and assuming isospin purity for the lowest $T=\frac{3}{2}$ level in ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$, absolute $log\mathrm{ft}$ values for each transition were determined. The measured excitation energies and $\beta$ decay transition rates to levels in ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$ are compared to recent shell-model calculations.

RADIOACTIVITY ${}_{}{}^{29}{}_{}{}^{}\mathrm{S}$; measured $\beta$-delayed protons, measured $T_{\frac{1}{2}}$; ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$ deduced levels, IAS proton decay, deduced $log\mathrm{ft}$ values compared to shell model.

• Received 30 May 1978

DOI:https://doi.org/10.1103/PhysRevC.19.177