The ${}_{}{}^{65}{}_{}{}^{}\mathrm{Cu}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$, t)${}_{}{}^{65}{}_{}{}^{}\mathrm{Zn}$ and ${}_{}{}^{71}{}_{}{}^{}\mathrm{Ga}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$, t)${}_{}{}^{71}{}_{}{}^{}\mathrm{Ge}$ reaction $Q$ values have been directly compared. Problems with a ${}_{}{}^{65}{}_{}{}^{}\mathrm{Zn}$ source for calibration of the proposed gallium solar neutrino detector are presented.

• Received 11 January 1984

DOI:https://doi.org/10.1103/PhysRevC.29.2343