Seminarium Fizyki Jądra Atomowego

The α decay is a powerful tool to study exotic nuclei, including far from the β stability line. Moreover, the α-decay fine structure allows the study of low-lying excited states in these nuclei that are difficult to populate due to low reaction cross-section. This thesis presents the results of α-decay study of two neutron-deficient nuclei 179Hg and 177Au. Data were acquired during two experiments performed at the Accelerator Laboratory of the University of Jyväskylä, Finland. Both experiments comprised of Jurogam 2 array, the RITU separator and GREAT spectrometer. The fine-structure in the α decay of 179Hg was observed for the first time. The M1 multipolarity was assigned to the 131.3 keV transition based on the experimentally deduced conversion coefficient. Additionally, the fine structure of the 177Au was identified. Three new transitions with energies of 156.1 keV, 215.1 keV and 134.5 keV were assigned to the 173Ir. Finally, the analysis of the other prompt and delayed α-γ coincidences was performed.