Lifetime measurements in 93Nb from photon and inelastic neutron scattering

被引：7
|
作者：
Orce, J. N. [1 ]
Fransen, C.
Linnemann, A.
Mckay, C. J.
Lesher, S. R.
Pietralla, N.
Werner, V.
Friessner, G.
Kohstall, C.
Muecher, D.
Pitz, H. H.
Scheck, M.
Scholl, C.
Stedile, F.
Warr, N.
Walter, S.
von Brentano, P.
Kneissl, U.
McEllistrem, M. T.
Yates, S. W.
机构：
[1] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
[2] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany
[3] SUNY Stony Brook, Dept Phys & Astron, Nucl Struct Lab, Stony Brook, NY 11794 USA
[4] Univ Stuttgart, Inst Strahlenphys, D-70569 Stuttgart, Germany
[5] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA
来源：
PHYSICAL REVIEW C | 2007年 / 75卷 / 01期
关键词：
D O I：
10.1103/PhysRevC.75.014303
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The low-spin structure of Nb-93 has been studied using the Nb-93(gamma,gamma(')), Nb-93(n,n(')gamma) and Zr-94(p,2n gamma gamma)Nb-93 reactions. Lifetimes were determined from both Nb-93(gamma,gamma(')) and Nb-93(n,n(')gamma) measurements. Branching ratios were measured, and multipolarities and spin assignments were determined from the Zr-94(p,2n gamma gamma)Nb-93 angular correlation experiment. From M1 and E2 strengths, the J(pi)=9/2(+) and 7/2(+) 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(9/2)circle times(2(1,MS)(+),Zr-92) configuration. The large B(M1) values determined in Nb-93 cannot be explained within the weak coupling limit of the interacting boson fermion model.
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页数：8
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