Low spin structure of 86Se: Confirmation of γ collectivity at N=52

The Se-86 nucleus has been investigated by gamma-ray spectroscopy using an array of Ge detectors placed at the exit of the fission-fragment mass separator Lohengrin of the Institut Laue-Langevin. New transitions have been identified by studying the beta decay of As-86. An excitation scheme is proposed and includes a 2(2)(+) level at 1399 keV and a possible 3(+) level that are well reproduced by shell model calculations with the most recent parametrization. The properties of the excitations indicate a possible onset of gamma collectivity in Se-86.