https://doi.org/10.1140/epjad/i2005-06-047-7
ENAM 2004
Identification of mixed-symmetry states in odd- A 93Nb
1
Department of Physics & Astronomy, University of Kentucky, 40506-0055, Lexington, KY, USA
2
Institut für Kernphysik, Universität zu Köln, 50937, Köln, Germany
3
Nuclear Structure Laboratory, Department of Physics & Astronomy, SUNY, 11794-3800, Stony Brook, NY, USA
4
Department of Chemistry, University of Kentucky, 40506-0055, Lexington, KY, USA
* e-mail: jnorce@pa.uky.edu
Received:
18
October
2004
Accepted:
18
February
2005
Published online:
3
May
2005
The low-spin structure of 93Nb has been studied using the (n,n’γ) reaction at neutron energies ranging from 1.5 to 2.6MeV and the 94Zr(p, 2nγ)93Nb reaction at bombarding energies from 11.5 to 19MeV. Excitation functions, lifetimes, and branching ratios were measured, and multipolarities and spin assignments were determined. The J
π = 3/2- and 5/2- states at 1840 and 2013keV, respectively, are identified as mixed-symmetry states associated with the particle-core coupling. These assignments are in agreement with energy systematics, spins and parities, and the observed strong M1 transitions to the 2p
1/2 one-phonon structure.
PACS: 21.10.Re Collective levels – / 21.10.Tg Lifetimes – / 25.20.Dc Photon absorption and scattering – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2005