Woods-Saxon potential parametrization at large deformations for plutonium odd isotopes

The structure of single-particle levels in the second minima of Pu-237,Pu-2 39,Pu-241 was analyzed with the help of an axially-deformed Woods-Saxon pot ential. The nuclear shape was parametrized in terms of the cassinian ovaloi ds. A parametrization of the spin-orbit part of the potential was obtained in the region corresponding to large deformations (second minimum), dependi ng only on the nuclear surface area. With this parametrization, we were abl e to reproduce successfully the spin. parity and energies of the rotational band built on the 8 mu s isomeric state in Pu-239 and; also, a spin assign ment for both isomeric states in Pu-237 and Pu-241 was carried out.