Entrance-channel effect in fission fragment anisotropies from B-11+U-235 and N-14+Th-232 systems - art. no. 041602

Citation
Br. Behera et al., Entrance-channel effect in fission fragment anisotropies from B-11+U-235 and N-14+Th-232 systems - art. no. 041602, PHYS REV C, 6404(4), 2001, pp. 1602
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C
ISSN journal
0556-2813 → ACNP
Volume
6404
Issue
4
Year of publication
2001
Database
ISI
SICI code
0556-2813(200110)6404:4<1602:EEIFFA>2.0.ZU;2-X
Abstract
Fission fragment angular distributions have been measured for B-11 + U-235 and N-14 + Th-232, both leading to the same compound nucleus Bk-246 and lyi ng on either side of the Businaro-Galtone critical asymmetry parameter. At comparable excitation energies, even though <l(2)> of the compound nucleus for N-14 + Th-232 are smaller than that of B-11 + U-235, the anisotropies m easured for the former are found to be significantly larger than that from the latter. Further, while the measured anisotropies in the case of B-11 U-235 are found to be consistent with the statistical saddle-point model, t he corresponding data for N-14 + Th-232 are found to be "anomalous" indicat ing the presence of entrance, channel dependent noncompound nuclear contrib utions.