Nuclear Resonance Fluorescence inTe122

Abstract

The mean life of the 564-keV excited state in ${\mathrm{Te}}^{122}$ has been determined by the nuclear-resonance-fluorescence method using a gaseous source of ${\mathrm{Sb}}^{122}$ in the form of antimony trihydride. The value $\tau =(1.05\mathrm{}\pm 0.16)\times {10}^{-11\mathrm{}}$ sec was obtained for the mean life of the 564-keV state.