Nuclear Energy States ofIn115

Abstract

The gamma rays of ${\mathrm{Cd}}^{115}$ and ${\mathrm{Cd}}^{115m}$ have been investigated by means of scintillation counting and coincidence methods. The $K$-shell conversion coefficient of the 34-keV gamma ray is measured to be 3.43±0.12, suggesting the transition to be $E1\mathrm{}$ in character and that the 858-keV level in the nucleus of ${\mathrm{In}}^{115}$ has positive parity. The gamma rays at 635, 650, and 890 keV which have been reported in the decay of ${\mathrm{Cd}}^{115m}$ are shown to emanate from ${\mathrm{Ag}}^{110m}$, present as an impurity.