QValue for theCu65(p, n)Zn65Reaction

The threshold for neutron emission from the ${\mathrm{Cu}}^{65}(p, n){\mathrm{Zn}}^{65}$ reaction has been measured to be 2.1653±0.0015 Mev, relative to the ${\mathrm{Li}}^7(p, n){\mathrm{Be}}^7$ threshold at 1.8811 Mev. The $Q$-value, -2.1322±0.0015 Mev, is in close agreement with previous threshold measurements and with the results of the ${\mathrm{Zn}}^{65}$ $\beta$-decay and neutron scattering measurements. This indicates that compound nucleus resonances probably do not affect the determination of the $Q$-value for this reaction from the neutron threshold.