Band interactions in {sup 74}Se

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:387260

Doering, J; Holcomb, J W; Johnson, T D ^[1]

---

1. and others

Properties of high-spin states in the neutron deficient even-even Se isotopes were studied extensively in the past and shape coexistence was found to be responsible for the irregularities in the yrast band of {sup 74}Se. Recently, the yrast band was observed up to a tentative 24{sup +} level, where the two highest levels contribute to an unusually strong upbend in the kinematical moment of inertia. In order to investigate this behavior in more detail, a new study of high-spin states in {sup 74}Se was initiated. The nucleus was produced via the {sup 64}Cu({sup 12}C,p2n){sup 74}Se reaction at a beam energy of 50 MeV, and the emitted {gamma} rays were detected with the Pittsburgh-Florida State Universities detector array. On the basis of coincidence data new states above the 20{sup +} member of the yrast sequence and a new sideband of positive parity feeding into the yrast band have been found. Moreover, a new band of negative parity on top of a level at 3840.9 keV has been introduced. Three other sequences of positive and negative parity could be extended to higher spin states. The observed change of structure in the bands is interpreted as due to g{sub 9/2} quasiparticle alignments.

• OSTI ID: 387260
• Report Number(s): CONF-931044--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 12 REACTIONS
COPPER 65 TARGET
GAMMA DETECTION
HIGH SPIN STATES
NUCLEAR STRUCTURE
SELENIUM 74