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Information × Registration Number 0218U001861, 0118U004792 , R & D reports Title Study of neutrino and weak interaction in double beta decay of 100Mo nuclei popup.stage_title Head Danevich Fedor, Registration Date 11-12-2018 Organization Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine popup.description2 The goal of the 2nd stage of the R&D was the experimental study of the double beta decay of the 100Mo core and the development of methods for double-beta decay searches. The research method was the development of low-temperature scintillation bolometers with a double lithium and magnesium molybdate crystal, new methods for estimation of the neutrino mass from experiments with several nuclides, methods for reducing the background due to the registration of Cerenkov radiation in tellurium oxide crystals for the search for double beta decay of 130Te nuclei, testing of low temperature scintillation bolometer with scintillation crystal of lithium molybdate, measuring the half-life of the 100Mo nuclei relative to two-neutrino double beta decay. Main results: 1. The crystal Li2Mg2 (MoO4) 3 was studied as a low temperature scintillation bolometer in the first time. 2. New methods of estimating the mass of neutrinos from experiments with several nuclides are proposed, the application of the proposed approaches to experiments on the search for double beta decay using the low-temperature scintillation bolometers with different nuclides is simulated. 3. The possibility of reducing the background by detecting the Cherenkov radiation in the tellurium oxide crystals for the search of 2b-decay of 130Te nuclei is shown in the first time. 4. A low-temperature scintillation bolometer with scintillation crystal of lithium molybdate, grown by the Czochralski method, was tested. 5. The half-life of 100Mo nuclei relative to the two-neutrino 2b decay to the main level of the child nucleus T1 / 2 = [6.90 +/- 0.06 (stat.) + 0.17-0.15 (syst.)] x 10^18 years is fined. Product Description popup.authors Бойко Роман Сергійович Даневич Федор Анатолiйович Зарицький Микола Кобичев Владислав Валерійович Пода Денис Валентинович Поліщук Оксана Григорівна Третяк Володимир Iллч Черняк Дмитро Миколайович popup.nrat_date 2020-04-02 Close