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- Title
Prescission Neutrons in the Fission of [sup 235]U and [sup 252]Cf Nuclei.
- Authors
Kornilov, N. V.; Kagalenko, A. B.; Hambsch, F.-J.
- Abstract
Experimental data obtained previously for the energy-angular distribution of neutrons originating from the fission of [sup 252]Cf (spontaneous fission) and [sup 235]U (thermal-neutron-induced fission) nuclei are analyzed, the angle being measured with respect to the direction of fission-fragment motion. A regularity common to all independent experiments is revealed: at an angle of about 90°, there exists an excess of neutrons (30% for [sup 252]Cf and 60% for [sup 235]U) that does not admit explanation within the model of neutron emission from fully accelerated fragments. Two possible explanations of this experimental fact— neutron emission during the acceleration process and the existence of an additional source of neutrons (predominantly, prescission neutrons)—are considered. It is shown that the latter conjecture describes the observed features for both nuclei more adequately. The total yield of prescission neutrons and their energy and angular distributions are determined.
- Subjects
NUCLEAR fission; NEUTRONS
- Publication
Physics of Atomic Nuclei, 2001, Vol 64, Issue 8, p1373
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/1.1398929