Delayed-proton emission following the beta decay of ${\mathrm{Ar}}^{33}$, ${\mathrm{Ca}}^{37}$, and ${\mathrm{Ti}}^{41}$ has been investigated in more detail. The number of proton peaks was observed to be six, ten, and seventeen, respectively. The half-lives were determined to be 178±5, 177±5, and 88±1 msec, respectively. Decay schemes are presented by assigning the peaks to virtual levels in ${\mathrm{Cl}}^{33}$, ${\mathrm{K}}^{37}$, and ${\mathrm{Sc}}^{41}$. The excitation energies of the first $T=\frac{3}{2}$ levels were measured to be 5.556±0.020, 5.021±0.020, and 5.90±0.03 MeV, respectively.

• Received 15 July 1966

DOI:https://doi.org/10.1103/PhysRev.152.995