I. Core-quasiparticle coupling model calculations as a test of IBA core descriptions of the even-mass Hg isotopes. II. Decay of mass-separated /sup 203/At

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5612159

Semmes, P B

Part I. The Core-Quasiparticle Coupling Model (CQCM) for odd-mass nuclei, which is based on dynamical field theory and the Bardeen-Cooper-Schrieffer (BCS) method, has been applied to two problems. In the first, a study of Pauli exchange effects for the odd particle in the Interacting Boson-Fermion Model (IBFM) is made by a comparison with the CQCM. Spectra for a partly filled j-shell coupled to Interaction Boson Model cores are calculated in both models, and values of the IBFM exchange parameter ..lambda../sub 0/ are found which lead to spectra similar to those in the CQCM. In the second application, CQCM calculations have been performed for the i/sub 13/2/ bands in the odd-mass Hg isotopes (A = 189 to 197), h/sub 9/2/ bands in the odd-mass Tl isotopes (A = 191 to 197), and the h/sub 11/2/ bands in the odd-mass Au isotopes (A = 189 to 195). Part II. The radioactive decay of /sup 203/At and /sup 203/Po has been studied with mass-separated sources from the UNISOR facility. Time-sequenced spectra of ..gamma..-rays, X-rays, and conversion electrons have been obtained, together with ..gamma..-..gamma..-t, ..gamma..-X-t, e/sup -/-..gamma..-t, and e/sup -/-X-t coincidence data.

• Research Organization: Georgia Inst. of Tech., Atlanta (USA)
• OSTI ID: 5612159
• Country of Publication: United States
• Language: English

Related Subjects

651813* -- Nuclear Properties & Reactions
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651913 -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ASTATINE 203
ASTATINE ISOTOPES
BCS THEORY
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
DATA
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FERMIONS
GAMMA SPECTRA
HEAVY NUCLEI
INFORMATION
INTERACTING BOSON MODEL
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MERCURY 189
MERCURY 197
MERCURY ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PARTICLE-CORE COUPLING MODEL
RADIOISOTOPES
SHELL MODELS
SPECTRA
THEORETICAL DATA
X-RAY SPECTRA