Band structure in odd-odd {sup 86}Nb

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Bulletin of the American Physical Society

OSTI ID:374927

Tabor, S L; Doering, J; Johns, G D

Odd-odd {sup 86}Nb has been investigated to explore the interaction between single-particle and collective degrees of freedom. High-spin states were populated using the {sup 58}Ni({sup 32}S,3pn){sup 86}Nb reaction at 135 MeV. Cascades of 3 or more {gamma} rays were detected with the early implementation of GAMMA-SPHERE while the evaporated charged particles were observed in the 96-element MICROBALL for channel selection. States have been observed with spins up to 3l{Dirac_h} and rotational frequencies over 1.2 MeV/{Dirac_h}. New bands appear at about 2.5 MeV and eventually become yrast. The level spacings in the yrast positive parity band show a large signature splitting whose phase reverses at the 10+ state, probably due to competition between quasiparticle alignment and rotation. The B(M1) values in this band also exhibit a large alteration, with strengths varying by an order of magnitude depending on the signatures of the states.

• OSTI ID: 374927
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HIGH SPIN STATES
NIOBIUM 86
YRAST STATES