Competing single-particle and collective structures in {sup 86}Nb

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.142· OSTI ID:664425

Tabor, S L; Doering, J; Johns, G D; Kaye, R A; Sylvan, G N ^[1]; Gross, C J ^[2]; Akovali, Y A; Baktash, C; Stracener, D W ^[3]; Hua, P F; Korolija, M; LaFosse, D R; Sarantites, D G ^[4]; Durham, F E ^[5]; Lee, I Y; Macchiavelli, A O; Rathbun, W ^[6]; Vander Molen, A ^[7]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
2. ORISE, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831 (United States)
3. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
4. Chemistry Department, Washington University, St. Louis, Missouri 63130 (United States)
5. Department of Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
6. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
7. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

The high-spin structure of odd-odd {sup 86}Nb was studied with the early implementation of GAMMASPHERE using 36 Compton-suppressed Ge detectors and the MICROBALL, a 95-element full-sphere charged-particle detector array. High-spin states were populated using the {sup 58}Ni({sup 32}S,3pn) reaction at 135 MeV with beams from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory. A number of bands were observed up to spins as high as (31{sup {minus}}). The yrast positive-parity band shares many characteristics with the {pi}g{sub 9/2}{circle_times}{nu}g{sub 9/2} bands in other odd-odd f-p-g shell nuclei. These similarities include the behavior of the moments of inertia, the magnitude and phase of the signature splitting and its phase reversal near the 10{sup +} state, and the strong alternations in the B(M1)/B(E2) strengths. The moments of inertia in the lowest pair of negative-parity bands start out with a sharp upbend and then gradually fall back to the rigid-body value. New positive- and negative-parity bands appear in the quasiparticle alignment region and eventually become yrast. Some additional positive-parity states around spin 17{h_bar} are candidates for fully or nearly fully aligned shell-model-like configurations. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098; AC05-76OR00033; AC05-96OR22464; FG02-88ER40406
• OSTI ID: 664425
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 56; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALIGNMENT
CHARGED PARTICLES
E2-TRANSITIONS
GE SEMICONDUCTOR DETECTORS
HIGH SPIN STATES
M1-TRANSITIONS
MOMENT OF INERTIA
NICKEL 58 TARGET
NIOBIUM 86
ODD-ODD NUCLEI
PARITY
QUASI PARTICLES
SHELL MODELS
SULFUR 32 REACTIONS
YRAST STATES