High-spin states and shape change in /sup 81/Sr

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.1345· OSTI ID:7048420

Hicks, G C; Gross, C J; Huettmeier, U J; Lu, X; Neuschaefer, G; Tabor, S L

High-spin states have been studied in /sup 81/Sr using the /sup 56/Fe(/sup 28/Si, 2pn..gamma..)/sup 81/Sr reaction at laboratory energies of 103.5 and 108 MeV. ..gamma..-..gamma.. coincidence and ..gamma..-ray angular distribution measurements were performed. New states were found at 5353 ((29/2)/sup +/), 5999 ((31/2)/sup +/), 6750 ((33/2)/sup +/), 2448 ((17/2)/sup -/), 2906 (((19/2)/sup -/)), 3495 (((21/2)/sup -/)), and 3980 (((23/2)/sup -/)). A shape change was seen in the yrast band at the (29/2)/sup +/ state. Below this level, the band exhibits strong signature splitting and predominant E2 decays. Above it lies a band with almost no signature splitting and predominant M1 decays. The yrare negative parity band shows almost no signature splitting and continues smoothly up to spin (23/2)/sup -/. The moments of inertia of the positive and negative parity bands are almost the same and increase with spin in a roughly parallel fashion.

• Research Organization: Department of Physics, Florida State University, Tallahassee, Florida 32306
• OSTI ID: 7048420
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
E2-TRANSITIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITED STATES
EXPERIMENTAL DATA
FUSION REACTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
HIGH SPIN STATES
INFORMATION
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
IRON 56 TARGET
ISOTOPES
M1-TRANSITIONS
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARITY
PARTICLE PROPERTIES
RADIATIONS
RADIOISOTOPES
ROTATIONAL STATES
SILICON 28 REACTIONS
SPIN
STRONTIUM 81
STRONTIUM ISOTOPES
TARGETS
YRAST STATES