Proton Reactions of <sup>238</sup>U in the 5-12 MeV Range

Turkevich, A.

doi:10.1524/ract.1994.64.34.145

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…11 for the proton-induced fission of 238 U. The solid circles of present work combined with the open squares from [42] and solid triangle from [43] indicate that the FWHM is fairly constant at 50~52 u in the wide range of excitation energy of 15 ~45 MeV. Therefore, the larger FWHM of 54~56 observed in 7 Li+ 232 Th needs to be explained by some reason other than the excitation energy of the compound nucleus.…”

Section: Angular Momentum Dependence Of Mass-yield Curvesupporting

confidence: 50%

Angular Momentum Effects on Mass Division in Actinide Fission

et al. 1999

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Angular momentum (/) effects on mass yield curves were studied for the fission from the same compound nucleus (CN) 239 Np of the same excitation energy but with different angular momenta, produced by the 7 Li+ 232 Th and p+ 2M U reactions. The effects were examined only for the complete fusion-fission events after careful estimation of the contribution of incomplete fusion-fission. It is found that the width of the whole mass yield curve is larger while the peak-to-valley ratio is smaller for the 7 Li+ 232 Th fission at the same excitation energy (E x ) of the CN, the former value increases while the latter ratio decreases with Ex. Statistical model calculations incorporating angular momentum dependent fission barriers were made to reproduce the observed cross section data of evaporation residues and fission. The observations can well be explained if the angular momentum dependence of fission barriers is taken into account in the competition process of fission and neutron evaporation in the decay of a compound nucleus except the observed trend of the width of the mass yield curve which could not be explained straightforwardly.

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Section: Angular Momentum Dependence Of Mass-yield Curvesupporting

confidence: 50%