Gallium-64

Abstract

A new isotope, 2.5-minute ${\mathrm{Ga}}^{64}$, was produced by the ($p, n$) reaction on ${\mathrm{Zn}}^{64}$ and identified by measurement of the excitation function, by bombardment of separated isotopes, and by chemical separation. Its decay scheme includes gammas of 0.97 Mev, 3.8 Mev, and probably 2.2 Mev. The maximum energy of the principle beta is about 5 Mev. The threshold for ${\mathrm{Zn}}^{64}$ ($p, n$) is 8.1±0.5 Mev.