GAMMA-RAY DECAY SCHEMES OF 109GPD 111GPD AND 111MPD

The levels of 109Ag and 111Ag excited in the beta decay of 109gPd, 111gPd, and 111mPd have been studied through the use of Ge(Li) and NaI(Tl) detectors, both in singles and in coincidence. Twenty-eight gamma rays from 109gPd have been placed into a decay scheme involving 11 excited levels in 109Ag. This scheme is very similar to those reported in previous studies of this decay. Approximately 150 gamma rays have been identified in the decay of 111gPd and 111mPd. More than 100 of these have been placed into a decay scheme involving 35 excited levels in 111Ag, of which 18 are populated in the decay of 111gPd abd 23 are populated in the decay of 111mPd. These levels are discussed in terms of several different model interpretations. Of particular interest is a group of levels in 111Ag that may represent a K = 1 2+ rotational band similar to bands reported recently in odd In isotopes. Other levels are not amenable to a simple rotationalnterpretation, although it is possible that the Ag nuclei are transitional, being rather soft toward deformation. © 1969.