Near-barrier fission of the system 12C+ 232Th

Karnik, A. ; Kailas, S. ; Chatterjee, A. ; Singh, P. ; Navin, A. ; Biswas, D. C. ; Nadkarni, D. M. ; Shrivastava, A. ; Kapoor, S. S. (1995) Near-barrier fission of the system 12C+ 232Th Zeitschrift für Physik A: Hadrons and Nuclei, 351 (2). pp. 195-198. ISSN 0939-7922

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The fission fragment angular distributions for the system 12C +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 of 16O and 19F +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.

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ID Code:85528
Deposited On:03 Mar 2012 10:41
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