P-odd and P-even asymmetries for reactions of double and triple fission of polarized target nuclei by cold neutrons

Autor: S. G. Kadmenskii, L. V. Titova, V. E. Bunakov
Rok vydání: 2012
Předmět:
Zdroj: Bulletin of the Russian Academy of Sciences: Physics. 76:942-946
ISSN: 1934-9432
1062-8738
Popis: The problem of describing of P-odd and P-even asymmetries in reactions of the double and triple fission of oriented nuclei by unpolarized cold neutrons is solved on the basis of the quantum theory of fission. P-odd and P-even asymmetries in differential cross sections of the studied reactions having a character of angular dependence other than the fission reaction of unoriented nuclei by polarized neutrons are obtained, using a spin matrix constructed for the density of a compound nucleus and allowing for interference from the fission amplitudes of various pairs of neutron resonances excited in a nucleus upon the capture of cold unpolarized neutrons by an oriented target nucleus. It is demonstrated that observation of the investigated P-odd asymmetries is possible only upon polarization of the target nucleus, while P-even asymmetries can be observed for both the polarization and alignment of the target nucleus.
Databáze: OpenAIRE
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