Residual interactions and tilted rotation in odd-odd {sup 164}Tm

Journal Article · Mon Mar 01 04:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.59.1351· OSTI ID:322002

Reviol, W; Riedinger, L L; Wang, X Z; Zhang, J ^[1]; Jensen, H J; Hagemann, G B; Bark, R A; Leoni, S; Loennroth, T; Schnack-Petersen, H; Shizuma, T; Wrzesinski, J ^[2]; Semmes, P B ^[3]

---

1. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
2. Niels Bohr Institute, University of Copenhagen, Tandem Accelerator Laboratory, Roskilde (Denmark)
3. Tennessee Technological University, Cookeville, Tennessee 38505 (United States)

High-spin spectroscopy on odd-odd {sup 164}Tm has produced new illustrations of departures from the predictions of principal-axis cranking. Among the nine strongly coupled rotational bands observed, four are assigned to the parallel and antiparallel couplings of two configurations {pi}h{sub 11/2}{nu}i{sub 13/2} and {pi}g{sub 9/2}{nu}i{sub 13/2}. This represents the first time that the high-spin properties of both couplings can be explored. We find that the measured B(M1)/B(E2) values in the K=1({up_arrow}{down_arrow}) coupling of {pi}h{sub 11/2}{nu}i{sub 13/2} are 50{percent} larger than those in the K=6 ({up_arrow}{up_arrow}) coupling, and represent the largest seen in this nucleus. Tilted-axis cranking calculations successfully explain the M1/E2 ratios in these two bands, while the particle-rotor calculations did not reproduce the full low-{ital K} enhancement. No inversion in the signatures of the K=6{pi}h{sub 11/2}{nu}i{sub 13/2} band is observed, but there is a small inversion in the K=1 coupling up to I=17{h_bar} and a large inversion in the {pi}h{sub 9/2}{nu}i{sub 13/2} band up to I=19{h_bar}. Remarkably, particle-rotor calculations with a p-n interaction included are able to reproduce these inversions. A stronger p-n interaction is needed to explain an inversion in the {pi}d{sub 3/2}{nu}i{sub 13/2} band. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 322002
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 59; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DEFORMED NUCLEI
HIGH SPIN STATES
NUCLEAR FORCES
NUCLEAR STRUCTURE
ODD-ODD NUCLEI
PROTON-NEUTRON INTERACTIONS
ROTATIONAL STATES
SPIN
THULIUM 164