Isomeric Transitions inTc93andTc96

Abstract

The 390-kev $\gamma$-line reported to be associated with ${\mathrm{Tc}}^{92}$ is found to be ${\mathrm{Tc}}^{93}$ and is shown to be a $M4\mathrm{}$ isomeric transition. Mass assignment to ${\mathrm{Tc}}^{96}$ is made for the isomeric transition previously known to have 34.4-kev energy and 51.5-minute half-life, and a weak positron branching was found.