Decay of {sup 160}Er{sup *} in {sup 16}O+{sup 144}Nd and {sup 64}Ni+{sup 96}Zr fusion reactions
- Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
The population of evaporation residue entry states in the decay of the compound nucleus {sup 160}Er{sup *}(54 MeV) is investigated in a cross-bombardment employing the reactions {sup 16}O+{sup 144}Nd and {sup 64}Ni+{sup 96}Zr. Evaporation residue cross sections and entry state {gamma}-ray fold distributions of the dominant exit channels were obtained for each reaction, using a 4{pi} {gamma}-ray detection system. An entrance-channel dependence of the {gamma}-ray fold distributions of the {ital xn} products is observed. This effect is described successfully by the statistical model making use of compound nucleus angular momentum distributions obtained with a fusion model that provides a good description of the bombarding energy dependence of fusion data for both reactions. In accordance with recent findings on the decay of {sup 164}Yb{sup *}, it is suggested that the observed differences in the population of the dominant exit channels originate from the primary spin distributions rather than a possible dependence of the compound nucleus decay on the formation mode.
- DOE Contract Number:
- FG02-88ER40406; FG02-87ER40316; AC05-84OR21400
- OSTI ID:
- 45550
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 51; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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