Level densities in hot Sn-12, La-131, and Ce-134 nuclei from giant dipole resonance gamma decay - art. no. 047601

We have measured high-energy gamma rays up to E-y=23 MeV from three highly excited medium mass nuclei, Sn-112, La-131, and Ce-134. The absolute La-131 gamma -ray multiplicity has been compared to statistical model calculation without any normalization. We have found that level density prescriptions of Pulhofer and Ignatyuk-Smirenkin-Tishin-Reisdorf fit the data with giant dipole resonance centroid energy and width taken from systematics, whereas the experimental level density parameters of Budtz-Jorgensen and Knitter fa il to fit the data.