Radiation fromGa64

Abstract

The ${\beta }^{+}$ decay of ${\mathrm{Ga}}^{64}$ and the subsequent gamma spectrum from the de-excitation of ${\mathrm{Zn}}^{64}$ have been studied. The ${\beta }^{+}$ transition to the ground state of ${\mathrm{Zn}}^{64}$ has an end point energy of 6.05±0.03 Mev with $logft=6.6\mathrm{}$ and another ${\beta }^{+}$ group or groups has an end point energy of 2.79±0.08 Mev with a $logft=4.6\mathrm{}$. No ${\beta }^{+}$ transition to the first excited state of Zn(2+) was observed and it was shown that the $log\mathrm{ft}$ corresponding to this transition is greater than 7.7. The gamma rays that were observed (0.80, 0.99, 1.25, 1.38, 1.56, 1.78, 1.95, 2.18, 2.34, 2.99, and 3.32 Mev) indicate excited states at 0.99(2+), 1.78(2+), and 3.32(1+) Mev.