Entrance-channel dependence of fission-fragment anisotropies: a direct experimental signature of fission before equilibration

Ramamurthy, V. S. ; Kapoor, S. S. ; Choudhury, R. K. ; Saxena, A. ; Nadkarni, D. M. ; Mohanty, A. K. ; Nayak, B. K. ; Sastry, S. V. ; Kailas, S. ; Chatterjee, A. ; Singh, P. ; Navin, A. (1990) Entrance-channel dependence of fission-fragment anisotropies: a direct experimental signature of fission before equilibration Physical Review Letters, 65 (1). pp. 25-28. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v65/i1/p25_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.65.25

Abstract

Fission-fragment angular distributions in reactions of 10B, 12C, 16O+232Th and 237Np, and 19F+237Np have been measured. While the measured anisotropies in B- and C-induced fission are found to be in agreement with the predictions of the standard Halpern-Strutinsky theory, they are anomalously large in the case of O- and F-induced fission. Such a discontinuous behavior in angular anisotropy with respect to the entrance-channel mass-to-charge asymmetry provides an experimental verification of the predictions of the preequilibrium fission model proposed earlier to explain the anomalous fragment angular distributions.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:15538
Deposited On:13 Nov 2010 09:23
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