The rotational gamma-continuum in the mass region A approximate to 110

摘要

Unresolved gamma transitions of Te-114 and of Sn-112 sorted into one-dimensional and two-dimensional spectra have been studied. The reaction Ni-64 + Cr-54 at bombarding energies 230, 240, 250, 260, 270 MeV was used and the gamma-rays were detected with the EUROBALL array. In the case of the nucleus 114Te the values of the multiplicity as a function of bombarding energy and of the moment of inertia were obtained. The effective moment of inertia was found to be almost constant in the interval I = 20-40 h, in contrast to the decreasing behaviour of the dynamic moment of inertia for the terminating yrast band. The ridge valley structures in E-gamma 1 x E-gamma 2 spectra of Te-114 and of Sn-112 were analysed with the fluctuation analysis technique. The analysis of the two nuclei are compared to simulations based on microscopic cranking calculations with residual interactions included. A rather good agreement is found between data and predictions. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 23]