High-spin states in odd-mass /sup 113en-dash119/Sb:. delta. J = 1 bands on 9/2/sup +/ proton-hole states
Properties of high-spin states in /sup 113,115,117,119/Sb have been studied via the /sup A/Cd(/sup 6/Li,3n)/sup A/+3Sb reactions. Using Ge(Li) and Si(Li) detectors, in-beam measurements of ..gamma..-ray excitation functions, ..gamma..-..gamma.. coincidences, ..gamma..-ray angular distributions, and pulsed beam-..gamma.. timing spectra were made to determine level energies, decay schemes, ..gamma..-ray multipolarities, J/sup ..pi../ assignments, isomeric lifetimes, and a g factor. Systematic ..delta..J = 1 bands built on low-lying 9/2/sup +/ proton-hole (2p-1h) states were observed in these nuclei. The bandheads that involve the excitation of a 1g/sub 9/2/ proton across the Z = 50 shell achieve an energy minimum near the middle of the neutron shell. The observed properties of these bands are consistent with significant prolate deformations; the band spacings imply a deformation asymmetry of ..gamma.. = 20/sup degree/ in a triaxial rotor model. In addition, single-particle and single-particle plus core-excitation states were observed in these Sb nuclei. Two isomers were identified, a 19/2/sup(/sup -/) state at 2796 keV in /sup 115/Sb (tau = 230 +- 4 nsec and g = +0.290 +- 0.005) and a (27/2/sup +/) state in /sup 119/Sb (tau = 1.23 +- 0.13 sec).
- Research Organization:
- Department of Physics, State University of New York, Stony Brook, New York 11794
- OSTI ID:
- 6077646
- Journal Information:
- Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 19:4; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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A=90-149
Experimental-- Energy Levels & Transitions-- (-1987)
651725 -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANTIMONY 113
ANTIMONY 115
ANTIMONY 117
ANTIMONY 119
ANTIMONY ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CADMIUM 110 TARGET
CADMIUM 112 TARGET
CADMIUM 114 TARGET
CADMIUM 116 TARGET
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
DAYS LIVING RADIOISOTOPES
DEFORMATION
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
GAMMA SPECTRA
HALF-LIFE
HEAVY ION REACTIONS
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOTOPES
LITHIUM 6 REACTIONS
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
MULTIPOLARITY
NEUTRON SPECTRA
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
SHELL MODELS
SPECTRA
TARGETS