β-decay properties of the very neutron-rich isotopes 86Ge and 86As

The beta-decay properties of very neutron rich nuclei Ge-86 and As-86 were measured at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. Spectroscopic information on new excited states in As-86 and in Se-86 was obtained and is interpreted within an advanced shell model approach. These calculations, previously explaining well the structure of Ge-84 and Ge-85, are not able to reproduce all the experimentally determined features of the measured level schemes of As-86 and Se-86. The Gamow-Teller decay of Ge-86 and As-86 is also investigated in a shell-model framework. The fission yield for Ge-86 is discussed.