| Yhteenveto: | This thesis deals with beta decay studies conducted at the Department of Physics, University of Jyväskylä. The studied neutron rich nuclei with 106≤A≤114 were produced in a proton induced fission of 238U and they were mass separated by using an on-line mass separation facility IGISOL. In this thesis, the main emphasis has been put on the fundamental properties of beta decay in the wide range of nuclei from the deformed Zr-region to the almost spherical Pd-nuclei. These studies have produced new beta decay data in the region of interest and led to the identification of seven new isotopes. The obtained experimental information have been compared to the global models of atomic masses and beta decay rates. In addition, this thesis includes macroscopic-microscopic calculations for the beta decay properties as a function of deformation and nucleon number. The comparison of the experimental and calculated data have been used to extract information about the interplay between deformation and fundamental beta decay properties of the nuclei studied.
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