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Author Kowal, M. ♦ Skalski, J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ ACTINIDES ♦ DEFORMATION ♦ -TRANSITIONS ♦ HAMILTONIANS ♦ MASS ♦ MIXING ♦ MULTIPOLARITY ♦ OSCILLATIONS ♦ PARITY ♦ PHONONS ♦ PLUTONIUM 240 ♦ URANIUM 236 ♦ WOODS-SAXON POTENTIAL ♦ ACTINIDE NUCLEI ♦ ALPHA DECAY RADIOISOTOPES ♦ ELEMENTS ♦ ENERGY-LEVEL TRANSITIONS ♦ EVEN-EVEN NUCLEI ♦ HEAVY NUCLEI ♦ ISOTOPES ♦ MATHEMATICAL OPERATORS ♦ METALS ♦ MULTIPOLE TRANSITIONS ♦ NUCLEAR POTENTIAL ♦ NUCLEI ♦ PARTICLE PROPERTIES ♦ PLUTONIUM ISOTOPES ♦ POTENTIALS ♦ QUANTUM OPERATORS ♦ QUASI PARTICLES ♦ RADIOISOTOPES ♦ SPONTANEOUS FISSION RADIOISOTOPES ♦ URANIUM ISOTOPES ♦ YEARS LIVING RADIOISOTOPES
Abstract We study low-energy shape oscillations of negative parity in the first and second (isomeric) minima in actinides. As a main tool, we use the phenomenological Woods-Saxon potential with a variety of shape deformations. This allows including a mixing of various multipolarities when considering oscillations with a fixed K quantum number. The phonon energies are determined either from the collective Hamiltonian with the microscopic-macroscopic energy and cranking mass parameters, or from its simplified version with the constant-mass parameters. The results for K{sup {pi}}=0{sup -},1{sup -} in the first minima are in reasonable agreement with experimental data, which include predicted E1 transitions; the K{sup {pi}}=2{sup -} energies are systematically overestimated. In the second minimum, as compared to the data for {sup 240}Pu and {sup 236}U, our calculated K=1,2 energies are overestimated, while the K=0 energies are three or more times too large. This signals either a noncollective character of the experimentally assigned K=0 states or a serious flaw of the model in the second minimum. More data on the K=0, I{sup {pi}}=1{sup -} collective states in the second minima of other nuclei are necessary to resolve this issue.
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-11-15
Publisher Place United States
Journal Physical Review. C, Nuclear Physics
Volume Number 82
Issue Number 5


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