Radioactive Isotopes of Mo and Tc

Abstract

Evidence is presented which permits the assignment of a 4.3-day Tc activity to ${\mathrm{Tc}}^{96}$. It decays by $K$-capture. X-ray photographs of long-period Tc activities show Mo x-rays resulting from $K$-capture decay of a 52-day Tc activity. Tc x-rays resulting from an isomeric transition involving a 95-day ${\mathrm{Tc}}^{97*}$ activity were also photographed.