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Information × Registration Number 0224U033082, (0124U003846) , R & D reports Title Neutrino properties and rare nuclear decays popup.stage_title Аналіз джерел фону та його зниження у експериментах з пошуку 2b-розпаду, набір даних в експерименті з 106Cd Head Kobychev Vladyslav V., Кандидат фізико-математичних наук Registration Date 17-12-2024 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description1 Determination of the nature (Dirac or Majorana particle), mass and scheme of neutrino mass states, checking of the lepton number conservation in neutrinoless double β decay of 100Mo, search for the double β-decay of 64Zn, 70Zn, 106Cd, 116Cd, 150Nd, 180W, 186W, 184Os, 190Pt at a new sensitivity level, studies of rare β decays of 50V, 113mCd and α decays of natural isotopes of Nd, Os, Pt. Development of a neutrino coherent scattering detector based on PbWO4. The search for solar axions from 7Li. popup.description2 The data of low-background measurements were analyzed and Monte Carlo simulations of background sources were performed, the radioactive contamination of materials was determined and the experimental setup was improved, based on the measurement data, the background level was analyzed and the sensitivity of the experiment for the search for 2β-decay of 106Cd was evaluated. An improved detector module of the CROSS installation was developed to search for 2β-decay of 100Mo. The sensitivity of the AMoRE setup to the 0ν2β-decay of 100Mo was evaluated based on the main data analysis and Monte Carlo simulations of background sources. Methods for increasing the sensitivity of bolometric experiments for the study of 0ν2β-decay of 130Te and 100Mo have been developed. The detection efficiency to γ-quanta to search for 2β-decay of 190Pt was simulated using the Monte Carlo method. The data of measurements with zinc tungstate scintillators were analyzed to search for 2β-processes in 64Zn, 70Zn, 180W, 186W. New limit on the effective Majorana mass of neutrino ⟨mν⟩ < 0.2-0.6 eV, the parameters of models expansions of the SM, the half-lives of 184Os, 192Os relative to various modes and channels of 2β-decay were set. From the measurements of the β-decay of 113Cd, the range of values of the axial-vector coupling constant g_A = 1.0-1.2 was estimated. The search for 7Li solar axions with a mass in the range of 2…8 keV was performed. New limits on α- and 2α-decay of naturally occurring osmium nuclides have been established. Product Description popup.authors Zarytskyi Mykola M Kasperovych Dmytro V. Klavdiienko Volodymyr R. Kropyvianskyi Borys M. Polishchuk Oksana H. Sokur Nazar V. Chaplynskyi Roman Yu. popup.nrat_date 2024-12-17 Close