Eur. Phys. J. A (2005) 25: 377-379
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

Abstract

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.