Abstract

This is the first study of $^{27}\mathrm{P}$ to measure both the $\ensuremath{\beta}$-delayed proton and $\ensuremath{\beta}$-delayed $\ensuremath{\gamma}$ decays. While no new proton groups in the astrophysically interesting energy region of 300--400 keV were observed, a new upper limit on the proton branching of 0.16% was estimated. Several new $\ensuremath{\gamma}$-ray lines were observed, mainly coming from the isobaric analog state in $^{27}\mathrm{Si}$, which has been assigned a more accurate energy value of 6638(1) keV.

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