Elsevier

Nuclear Physics A

Volume 502, 9 October 1989, Pages 271-278
Nuclear Physics A

Angular distributions of 230, 232Th(n, f) and the third-minimum hypothesis

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Abstract

Angular distributions of light (or heavy) fission fragments may exhibit an asymmetry with respect to ϑc.m. = 90° due to interference effects between even and odd partial waves if only a few transition states contribute to fission. This possibility is explored for neutron induced fission of 230, 232Th in the region of subbarrier resonances. Only in case of 23Th(n, f) a slight but significant asymmetry is observed. It is interpreted in support of the third-minimum hypothesis.

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supported by Deutsche Forschungsgemeinschaft, contr.no Fr 575/1–3

§

This work is part of the doctoral thesis of F.-M. Baumann submitted to the Fakultät für Physik und Astronomie, Ruhr-Universität Bochum 1989

+

present address: GSI, D-6100 Darmstadt, F.R. Germany

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