Role of transitional levels in 237Np (γ,f): Perspectives for studying highly deformed systems
Creators
- 1. Universidade de Santo Amaro/UNISA, Sao Paulo, SP (Brazil)
- 2. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, SP (Brazil)
- 3. Instituto de Biocie circumflex ncias, Universidade Estadual de Sao Paulo, Botucatu, SP (Brazil)
- 4. Universidade Estadual de Santa Cruz, Ilheus, BA (Brazil)
- 5. Instituto Superior de Tecnologias y Ciencias Aplicadas, Havana (Cuba)
- 6. Universidade Catolica de Santos/UNISANTOS, Santos, SP (Brazil)
- 7. Instituto de Pesquisas Energeticas e Nucleares/IPEN, Sao Paulo, SP (Brazil)
Description
The transition levels at the top of the two 237Np 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 237Np, 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 237Np
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 74
- Journal Issue
- 3
- Journal Page Range
- p. 034324-034324.6
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38032366
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- COORDINATES; CROSS SECTIONS; DEFORMED NUCLEI; FISSION BARRIER; NEPTUNIUM 237; NUCLEAR DEFORMATION; PHOTOFISSION; SINGLE-PARTICLE MODEL; WOODS-SAXON POTENTIAL
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; DEFORMATION; ENERGY; FISSION; HEAVY NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MATHEMATICAL MODELS; NANOSECONDS LIVING RADIOISOTOPES; NEPTUNIUM ISOTOPES; NUCLEAR MODELS; NUCLEAR POTENTIAL; NUCLEAR REACTIONS; NUCLEI; ODD-EVEN NUCLEI; PHOTONUCLEAR REACTIONS; POTENTIAL ENERGY; POTENTIALS; RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- (c) 2006 The American Physical Society