ISSN:
1434-601X
Keywords:
25.85 Ge
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The fission fragment angular distributions for the system12C +232Th have been measured in the energy range 0.97〈Ec.m./VB〈1.22. The measured anisotropies have been compared with the predictions of the standard saddle point statistical model, using the second moment of the compound nucleus spin distribution 〈l2〉 deduced from a Wong model fit to the fission excitation function. While the measured anisotropies agree with the standard saddle point statistical model for Ec.m./VB〉1.05, they are abnormally large at lower energies. This is also true for the existing measurements of16O and19F +232Th systems. Since for this system pre-equilibrium fission contributions are not expected, this anomaly indicates strong channel coupling effects leading to an increase in 〈l2〉 at sub-barrier energies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01289529
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