Decay Of Ag108m

The ?-spectrum of the long-living isomer of Ag108 (T1/2?5 years) was studied by means of Ge(Li) semiconductor detectors. Eight gamma transitions were found with energies of 79.5, 405.7, 433.7, 613.5, 633.0, 722.6, 836.5 and 1020 keV and correspanding relative intensities of 0.083, 0.008,1, 1.05, 0.0018,1.02,0.0006 and 0.010. The conversion coefficients and multipolarities were determined for transitions of 79.5, 613.5 and 722.6 keV. In the decay scheme of Ag108m the sequence of the levels 4+ (1047 keV) and 0+ (1049 keV) is given and the existence of the levels 1454 keV and 1469 keV is confirmed. Spin and parity 2- were ascribed to the 80 keV level of Ag108 on the basis of the multipolarity of the 79.5 keV transition.