Lifetime measurements in {sup 93}Nb from photon and inelastic neutron scattering

Journal Article · Mon Jan 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.014303· OSTI ID:20990942

Orce, J N; McKay, C J; Lesher, S R; McEllistrem, M T ^[1]; Fransen, C; Linnemann, A; Werner, V; Friessner, G; Muecher, D; Scholl, C; Warr, N; Brentano, P von ^[2]; Pietralla, N ^[2]; Kohstall, C; Pitz, H H; Stedile, F; Walter, S; Kneissl, U ^[3]; Scheck, M ^[4]; Yates, S W ^[1]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
2. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany)
3. Institut fuer Strahlenphysik, Universitaet Stuttgart, D-70569 Stuttgart (Germany)
4. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055, USA (United States)

The low-spin structure of {sup 93}Nb has been studied using the {sup 93}Nb({gamma},{gamma}{sup '}), {sup 93}Nb(n,n{sup '}{gamma}) and {sup 94}Zr(p,2n{gamma}{gamma}){sup 93}Nb reactions. Lifetimes were determined from both {sup 93}Nb({gamma},{gamma}{sup '}) and {sup 93}Nb(n,n{sup '}{gamma}) measurements. Branching ratios were measured, and multipolarities and spin assignments were determined from the {sup 94}Zr(p,2n{gamma}{gamma}){sup 93}Nb angular correlation experiment. From M1 and E2 strengths, the J{sup {pi}}=9/2{sup +} and 7/2{sup +} states at 1297.1 keV and 1483.6 keV, respectively, are proposed as members of the quintet of mixed-symmetry states associated with the {pi}1g{sub 9/2}(multiply-in-circle sign)(2{sub 1,MS}{sup +},{sup 92}Zr) configuration. The large B(M1) values determined in {sup 93}Nb cannot be explained within the weak coupling limit of the interacting boson fermion model.

• OSTI ID: 20990942
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
BRANCHING RATIO
COLLECTIVE MODEL
INELASTIC SCATTERING
INTERACTING BOSON MODEL
KEV RANGE
MASS NUMBER
NEUTRON DIFFRACTION
NEUTRON REACTIONS
NEUTRONS
NIOBIUM 93
PHOTON-NUCLEON INTERACTIONS
PHOTONS
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
SPIN
VIBRATIONAL STATES
ZIRCONIUM 92
ZIRCONIUM 94