Shapes and beta-decay in proton rich Ge, Se, Kr and Sr isotopes

We study ground states and beta-decay properties of the proton rich isotope chains Ge, Se, Kr, and Sr. We use a deformed selfconsistent HF+RPA approac h with density-dependent effective interactions of Skyrme type. We find tha t most of the isotopes present two HF minima corresponding to two different shapes. In addition to static quadrupole moments and other ground state ba nd properties, we present results for Gamow Teller strength distributions, as well as for half-lives and summed strengths. The role of deformation is particularly emphasized. (C) 1999 Elsevier Science B.V. All rights reserved .