The beta-decay properties in the vicinity of $^{78}$Ni

The beta-decay properties of neutron-rich Cu to Ga nuclei in the vicinity of the doubly magic $^{78}$Ni have been calculated within the density-functional approach plus continuum QRPA (DF+CQRPA) [1]. The framework allows for a fully microscopic description of the Gamow-Teller (GT) and first forbidden (FF) transitions between $dsgh$ and $fpp$ shells. The new theoretical predictions are compared with our previous ones, with the standard FRDM calculations [2] and recent experimental data. Of particular importance are new high quality gamma ray spectroscopy data obtained for Zn to Ga isotopes with N$>$50 at Holifield Radioactive Ion Beam Facility (HRIBF). In $^{78}$Ni region, the half-lives calculated with blocking of the odd-proton on the 1pf$_{5/2}$-orbital agrees with the data better than the ones with no blocking as well as the ones from standard FRDM calculations used for the r-process modeling. The high-energy first forbidden transitions in the nuclei with N$>$50 populating low lying excited levels in the daughter nuclei produce a strong impact on the total half- lives and especially on the delayed neutron emission. The effect of reduction of the Pn-values compared to the pure GT- approximation in N$>$50 isotopes [1] will be discussed.\\[0pt] [1] I.N. Borzov, Phys. Rev. C 67, 025802 (2003); Phys. Rev. C 71, 065801 (2003). [2] P. Moeller, B. Pfeiffer and K-L Kratz, Phys. Rev. C 67, 055802 (2003).