Spectroscopic study of the high-spin states in /sup 135/Pr

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.34.523· OSTI ID:5379988

Semkow, T M; Sarantites, D G; Honkanen, K; Abenante, V; Adler, a L.A.; Baktash, C; Johnson, N R; Lee, I Y; Oshima, M; Schutz, Y; Chen, Y S; Saladin, J X; Chen, C Y; Dietzsch, O; Larabee, A J; Riedinger, L L; Griffin, H C

An in-beam spectroscopic study of /sup 135/Pr was made using a 91 MeV /sup 120/Sn(/sup 19/F,4n) reaction. Two positive parity bands were observed based on the g-italic/sub 7/2/ proton orbital with (..pi..,..cap alpha..) = (+, +- (1/2)). A strongly populated negative parity (-,-(1/2)) band was also seen (based on the h-italic/sub 11/2/ proton orbital). The unfavored (-,+(1/2)) structure may also be present. In both the positive and negative parity bands the first backbend is attributed to the alignment of two h-italic/sub 11/2/ protons on the basis of cranked shell model calculations. The crossing frequency was found to increase in the (-,-(1/2)) band because of blocking of the h-italic/sub 11/2/ orbital. The alignment of protons in /sup 135/Pr causes a shift of ..gamma.. towards --+10/sup 0/ with nearly collective prolate deformation. Also, there is some evidence for a second backbend and an upbend in the case of positive and negative parity bands, respectively. They could result from the alignment of the h-italic/sub 11/2/ neutrons.

• Research Organization: Department of Chemistry, Washington University, St. Louis, Missouri 63130
• OSTI ID: 5379988
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 34:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BACKBENDING
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
DEFORMATION
DISTRIBUTION
ENERGY LEVELS
ENERGY RANGE
FLUORINE 19 REACTIONS
GAMMA SPECTROSCOPY
HEAVY ION REACTIONS
HIGH SPIN STATES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PRASEODYMIUM 135
PRASEODYMIUM ISOTOPES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SHELL MODELS
SPECTROSCOPY
SPIN
TARGETS
TIN 120 TARGET