Neutron Groups fromK(α, n)Sc

Neutron groups resulting from the alpha-particle bombardment of separated isotopes of potassium have been observed. Ground-state $Q$ values of -3.42±0.06 Mev for ${\mathrm{K}}^{41}(\alpha , n){\mathrm{Sc}}^{44}$ and -7.16±0.06 Mev for ${\mathrm{K}}^{39}(\alpha , n){\mathrm{Sc}}^{42}$ were obtained. A large number of excited states or groupings of states were also observed. The presence of chlorine in one of the targets permitted measurement of the ${\mathrm{Cl}}^{37}(\alpha , n)K^{40}$ reaction as well. A ground-state $Q$ value of -3.86±0.06 Mev was obtained. A tentative value of -5.89±0.06 Mev can be given for the ${\mathrm{Cl}}^{35}(\alpha , n){\mathrm{K}}^{38}$ ground state.