Acta Physica Polonica B

Vol. 38, No. 4, April 2007, page 1271

Identification of Excited States in the N=Z Nucleus 82Nb

L.S. Caceres, M. Gorska, A. Jungclaus, P.H. Regan, A.B. Garnsworthy, S. Pietri, Zs. Podolyak, D. Rudolph, S.J. Steer, H. Grawe, D.L. Balabanski, F. Becker, P. Bednarczyk, G. Benzoni, B. Blank, C. Brandau, A.M. Bruce, F. Camera, W.N. Catford, I.J. Cullen, Zs. Dombradi, P. Doornenbal, E. Estevez, H. Geissel, W. Gelletly, J. Gerl, J. Grebosz, A. Heinz, R. Hoischen, G. Ilie, J. Jolie, G.A. Jones, M. Kmiecik, I. Kojouharov, F.G. Kondev, T. Kurtukian-Nieto, N. Kurz, S. Lalkowski, L. Liu, A. Maj, S. Myalski, F. Montes, M. Pfuetzner, W. Prokopowicz, T. Saito, H. Schaffner, S. Schwertel, T. Shizuma, A.J. Simons, S. Tashenov, P.M. Walker, E. Werner-Malento, O. Wieland, H.J. Wollersheim

Information on the first excited states in the N=Z=41 nucleus 82Nb sheds light on the competition of isospin T=0 and T=1 states in the A \sim 80 region. The measurement was performed at the GSI laboratory using fragmentation of a 107Ag primary beam at 750 MeV/u on a 4 g/cm2 9Be target. The fragments were separated and identified unambiguously in the FRagment Separator. Three excited states were observed and the half-life estimate for the isomeric state was extracted. A tentative spin assignment based on the isobaric analogue states systematics in the Tz=1 nucleus 82Zr, and transition probabilities indicate T=1 character of the first two excited states, and T=0 for the isomeric state.

PACS numbers: 29.30.Kv, 23.20.Lv


 
Table of Contents Back to Number 4 contents