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Information × Registration Number 0224U033498, (0123U103151) , R & D reports Title Study of double beta decay of nuclei 106Cd and 116Cd with aid of scintillators from enriched isotopes popup.stage_title Проведення вимірювань та обробка даних Head Kasperovych Dmytro V., Кандидат фізико-математичних наук Registration Date 29-12-2024 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description1 Experimental studies of double beta processes of 106Cd and 116Cd nuclei at a new level of sensitivity popup.description2 The experiment to search for the double-beta decay of 106Cd using an enriched crystal scintillator 106CdWO4 in a close geometry with two large-volume CdWO4 scintillators has been completed. New lower limits have been set for the partial half-lives of the near-resonance neutrinoless double electron capture channels in 106Cd to the 2718-keV, 2741-keV, and 2748-keV excited states of the daughter nucleus 106Pd: 3.4×10^21 years, 1.5×10^21 years, and 3.6×10^21 years, respectively. The experimental limit for the transition to the 2718-keV excited state of 106Pd approaches the region of theoretical predictions. Tests of the spectrometric characteristics of the setup to search the double-beta decay of 116Cd to the excited states of the daughter nucleus using a cadmium tungstate scintillator enriched with 116Cd and 4 HPGe detectors working in coincidence mode was carried out. It was found that the resolution of the HPGe detectors significantly deteriorated, leading to a decrease in the experimental sensitivity to the searched processes. The development of an alternative experimental geometry using two additional cadmium tungstate scintillators in a close geometry with the investigated crystal has been conducted, which may provide higher sensitivity to the searched processes. Product Description popup.authors Klavdiienko Volodymyr R. Sokur Nazar V. popup.nrat_date 2024-12-29 Close