Structure of the Fission Transition Nucleus
- 20 July 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 171 (4), 1267-1277
- https://doi.org/10.1103/physrev.171.1267
Abstract
Fission-fragment angular distributions for the () reaction were measured for incident neutron energies of 200, 300, 400, 500, 600, 700, 843, 998, and 1184 keV. A novel geometry Lexan (polycarbonate) detector was used to detect the fission fragments. The angular distributions show intermediate-angle peaks and change shape rapidly with changes in neutron energy. Based on a sophisticated Hauser-Feshbach analysis, which includes level-width fluctuation corrections of the energy variation of the fission cross section and angular distributions, a description of the highly deformed fission transition nucleus is given. Assignments of the quantum numbers (, ) are made for three low-energy single-particle states, and they are ½+, , and . In addition, the presence of another state is demonstrated. Assignments of the energy and the barrier curvature of these states are also given.
Keywords
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