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Low- and high-spin excited states in /sup 139/Pr

Journal Article · · Phys. Rev. C; (United States)
;
The level structure of the N = 80 nucleus /sup 139/Pr has been studied in-beam by the /sup 140/Ce(p,2n..gamma..)/sup 139/Pr reaction using a 25-MeV p beam and by the /sup 139/La(..cap alpha..,4n..gamma..)/sup 139/Pr reaction using a 47-MeV ..cap alpha.. beam. ..gamma..-ray singles, ..gamma..-..gamma.. coincidence (prompt and delayed), and ..gamma..-ray angular distribution experiments were performed. We have assigned 41 ..gamma.. rays deexciting 24 states in /sup 139/Pr from the (p,2n..gamma..) reaction and 43 ..gamma.. rays deexciting 31 (generally higher-spin) states from the (..cap alpha..,4n..gamma..) reaction, for a total of 43 different states. These in-beam experiments, taken together with results from /sup 139/Nd/sup m//sup +//sup g/ decay and the /sup 141/Pr(p,t)/sup 139/Pr reaction, allowed J/sup ..pi../ assignments to be made for most of the states and allowed us to deduce the intrinsic configurations for many of them. These are discussed in terms of single-quasiparticle shell-model states and triaxial weak-coupled collective states and are compared with systematics for this nuclear region.
Research Organization:
National Superconducting Cyclotron Laboratory and Departments of Chemistry and of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
OSTI ID:
5373291
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 37:5; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CERIUM 140 TARGET
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
DATA
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
LANTHANUM 139 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PRASEODYMIUM 139
PRASEODYMIUM ISOTOPES
PROTON REACTIONS
QUASI PARTICLES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SHELL MODELS
SPECTRA
SPIN
TARGETS
WEAK-COUPLING MODEL