The Detection of Positron-Conjoint Nuclear Gamma-Radiation

An absorption technique is described for the rapid detection and measurement of nuclear gamma-radiation from positron emitters. Applicability of the method was shown in the verification of the energy and intensity of the gamma-ray from ${\mathrm{Cu}}^{64}$. The method was further used to find a new gamma-ray of 0.81±0.01 Mev from ${\mathrm{Ti}}^{45}$; the number of positrons per gamma is (19±2):1. The positron maximum energy of 1.00±0.02 Mev was also observed, and $K$-electron capture demonstrated.