$Q$ values were measured for nine reactions on targets of ${}_{}{}^{78,80,82}{}_{}{}^{}\mathrm{Se}$ with uncertainties of 2.3 to 4.3 keV. Uncertainties for six of these measurements are smaller than those calculated from the 1976 mass excesses. The present $Q$-value measurements, when combined with previous measurements, result in decreases of the masses of ${}_{}{}^{82}{}_{}{}^{}\mathrm{Se}$, ${}_{}{}^{83}{}_{}{}^{}\mathrm{Se}$, and ${}_{}{}^{83}{}_{}{}^{}\mathrm{Br}$ by 11, 67, and 16 keV, respectively.

NUCLEAR REACTIONS ${}_{}{}^{80}{}_{}{}^{}\mathrm{Se}(d, p){}_{}{}^{81}{}_{}{}^{}\mathrm{Se}$, ${}_{}{}^{78,80,82}{}_{}{}^{}\mathrm{Se}(p, d){}_{}{}^{77,79,81}{}_{}{}^{}\mathrm{Se}$, ${}_{}{}^{78,80,82}{}_{}{}^{}\mathrm{Se}(p, t){}_{}{}^{76,78,80}{}_{}{}^{}\mathrm{Se}$, ${}_{}{}^{78,80}{}_{}{}^{}\mathrm{Se}(p, \alpha ){}_{}{}^{75,77}{}_{}{}^{}\mathrm{As}$ measured $Q$ values.

• Received 9 August 1982

DOI:https://doi.org/10.1103/PhysRevC.26.2668