On the asymmetric deformation of fissioning nuclei

Pashkevich, V.V.

doi:10.1016/0375-9474(71)90884-0

On the asymmetric deformation of fissioning nuclei

V.V. Pashkevich

1971

19 pages

Published in:

Nucl.Phys.A 169 (1971) 275-293

Published: 1971

DOI:

10.1016/0375-9474(71)90884-0

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Abstract: (Elsevier)

The potential energy of a nucleus at large (scission) deformation is calculated by the shell- correction method due to Strutinsky. The shape of the nucleus in the zeroth-order approximation is taken to be the Cassinian ovaloid, the deviation being expanded in a series of Legendre polynomials. Asymmetric shapes of the nucleus are studied; a definition of the Woods-Saxon type nuclear potential is given; the single-particle spectrum, shell correction, liquid-drop energy and total potential energy are calculated. It is shown that the transuranium nuclei are symmetric at the first barrier and in the second minimum of the potential energy. The second saddle point is situated at a large asymmetric deformation. The nuclear asymmetry near the scission point is in qualitative agreement with experimental data on the asymmetry in the mass distribution of the fission fragments. The agreement between the theoretical results and experimental data on the fission barriers is improved when the asymmetry is taken into account.

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Figures(0)

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