High-spin bands in {sup 80}Kr

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.76· OSTI ID:69509

Doering, J; Wood, V A; Holcomb, J W; Johns, G D; Johnson, T D; Riley, M A; Sylvan, G N; Womble, P C; Tabor, S L ^[1]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)

High-spin states in {sup 80}Kr were studied using the {sup 65}Cu({sup 18}O,{ital p}2{ital n}) reaction at 65 MeV. Prompt {gamma}-{gamma} coincidences were measured using the Pitt-FSU detector array with nine high-purity Compton-suppressed Ge detectors and a 28-element Bismuth Germanate multiplicity filter. The previous level scheme has been extended by 16 new states up to spins and parities of 20{sup +} and (19{sup {minus}}). The known band crossing in the positive-parity yrast band of {sup 80}Kr near {h_bar}{omega}{approx}0.5 MeV may be due to a {ital g}{sub 9/2} neutron alignment, rather than a {ital g}{sub 9/2} proton alignment as had been previously thought, based on the predicted oblate shape by Hartree-Fock-Bogolyubov calculations. No evidence was found for a second crossing in the yrast sequence up to {h_bar}{omega}=0.9 MeV. The new extension of the ground-state band through nonyrast states points to another band crossing at {h_bar}{omega}{approx}0.62 MeV which may be caused by a {ital g}{sub 9/2} proton alignment. A new negative-parity high-spin band shows that rotational bands do form at excitations above the strongly mixed low-spin levels as in the isotone {sup 82}Sr.

• Sponsoring Organization: USDOE
• OSTI ID: 69509
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 52; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COINCIDENCE METHODS
COPPER 65 TARGET
EXCITATION
GROUND STATES
HARTREE-FOCK-BOGOLYUBOV THEORY
HIGH SPIN STATES
KRYPTON 80
MEV RANGE 10-100
MULTIPLICITY
OXYGEN 18 REACTIONS
PARITY
ROTATIONAL STATES
SPIN
YRAST STATES