Role of transitional levels in {sup 237}Np ({gamma},f): Perspectives for studying highly deformed systems
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP (Brazil)
- Instituto de Biocie circumflex ncias, Universidade Estadual de Sao Paulo, Botucatu, SP (Brazil)
- Universidade Estadual de Santa Cruz, Ilheus, BA (Brazil)
- Instituto de Pesquisas Energeticas e Nucleares/IPEN, Sao Paulo, SP (Brazil)
- Instituto Superior de Tecnologias y Ciencias Aplicadas, Havana (Cuba)
The transition levels at the top of the two {sup 237}Np fission barriers were obtained for the first time by means of the so-called semimicroscopic combined method, which we have developed and implemented. To overcome the difficulties in dealing with large nuclear deformations, we used our developed BARRIER code, which calculates single-particle spectra in a deformed Woods-Saxon potential using a coordinate system based on Cassini ovaloids as nuclear shape parametrization. The results enabled us to describe the experimentally observed near-barrier photofission cross-section structures for {sup 237}Np, as well as a subbarrier shelf, the latter being consistently interpreted in terms of the accumulation of levels at the top of the inner and outer double fission barrier of {sup 237}Np.
- OSTI ID:
- 20863796
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 74, Issue 3; Other Information: DOI: 10.1103/PhysRevC.74.034324; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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