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We have studied two regions of doubly closed shell nuclei over the nuclear chart: stable nuclei with N ~ Z around 40Ca and highly neutron-rich ones close to drip-line above the 132Sn shell closure. Both experimental and theoretical works have been performed for each of these mass regions. The experimental part includes three works: (i) high energy characterization of the Compton suppressed Clover detector, (ii) In-beam gamma-ray spectroscopic studies of high spin states of 35Cl in mass 40 region and (iii) X- and gamma- ray spectroscopic studies of fission fragments of 252Cf spontaneous...

We have performed both experimental and theoretical studies with the clover detectors. Gamma-rays from standard radioactive sources and the beta decay of a radioactive 11Be beam have been used to investigate the response of seven escape suppressed TIGRESS detectors up to an energy of 8 MeV. Measurements of absolute efficiency, addback factor, fold distribution, peak-to-total ratio and ratio of escape peak area to full energy peak area have been performed. Comparisons have been made between TIGRESS and similar composite detectors. We have also performed comparison of background characteristics...