Coulomb excitation of 76,80,82Se

The collective structure of the even-even nuclei 76,80,82Se has been studied using Coulomb excitation with 16O, 48Ti and 208Pb ions. About 20 E2 matrix elements were determined in each isotope. The measured matrix elements are compared with the predictions of simple geometric and algebraic collective models. The E2 properties and energy level spectra of the 76,80,82Se nuclei exhibit features characteristic of anharmonic vibrational collective motion. Although the simplest collective vibrational models exhibit the general features of the data, they do not reproduce the fine details. The influence of a number of physical effects on the data was investigated. These include Coulomb-nuclear interference, mutual excitation and the effect due to the semiclassical approximation of the Coulomb-excitation formalism. (orig.)