Eur. Phys. J. A 10, 151-155

Spectroscopy of using heavy-ion-induced fission

R. Krücken^{1, 2}, S.J. Asztalos², R.M. Clark², M.A. Deleplanque², R.M. Diamond², P. Fallon², I.Y. Lee², A.O. Macchiavelli², G.J. Schmid², F.S. Stephens², K. Vetter² and Jing-Ye Zhang<sup>1, 3

1</sup>  A.W. Wright Nuclear Structure Laboratory, Yale University, New Haven, CT 06520, USA
²  Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
³  University of Tennessee, Knoxville, TN 37996, USA

reiner.kruecken@yale.edu

(Received: 28 November 2000 / Revised version: 1 February 2001 Communicated by D. Guerrau)

Abstract
High-spin states in ¹¹²Pd were studied using prompt -ray spectroscopy with Gammasphere following heavy-ion-induced fission in the reaction ¹⁸O + ²⁰⁸Pb at 91 MeV. A new 8⁺ level at 2638 keV was discovered with transitions connecting it to the yrast band and the quasi-gamma band. The three, now established, closely spaced 8⁺ states indicate a mixing between the ground-state band, s-band, and quasi-gamma band. Several high-spin structures with likely negative parity have been extended to higher spin and it is proposed that they are based on the and configurations.

PACS
23.20.Lv - Gamma transitions and level energies.
25.70.Jj - Fusion and fusion-fission reactions.
21.60.-n - Nuclear-structure models and methods.
27.60.+j - .

© Società Italiana di Fisica, Springer-Verlag 2001