Radioactive Isotopes of Mo and Tc

Evidence is presented which permits the assignment of a 4.3-day Tc activity to Tc⁹⁶. 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 Tc97* activity were also photographed.