Search academic texts

Information × Registration Number 0219U001921, 0117U001316 , R & D reports Title The study of rare decays of atomic nuclei, measuring the fluxes of neutrinos, search for processes beyond the Standard Model of elementary particles popup.stage_title Head Danevich Fedor, Registration Date 26-03-2019 Organization Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine popup.description2 Precision measurements of two-neutrino double beta decay of Se-82 and Cd-116 nuclei have been performed. New limits on the neutrinoless mode of decay of these nuclei are established, from which new restrictions on the effective mass of Mayorana neutrino at the level of 1.0-1.7 eV are obtained. With the Borexino detector, precision spectroscopic measurements of the solar neutrino fluxes from the proton-proton cycle and simultaneously from the decays of Be-7, B-8 and from pp- and pep reactions were performed, and the best restriction on the hep-neutrino flux was established. The energy of the first excited level of the Sn-115 nucleus was measured with the highest precision (3 eV), which allowed to improve the accuracy of determining the energy of beta decay of In-115 nucleus to this excited level (the beta decay with the least known decay energy). For the first time, the Li2Mg2(MoO4)3 crystal has been studied as a scintillation bolometer, which can be used to search for double beta decay of Mo-100 nuclei. With the help of the developed liquid scintillator with thorium, the half-life of the Po-212 nucleus was measured with precision better than its table value. Product Description popup.authors Бойко Роман Сергійович Даневич Федор Анатолійович Зарицький Микола Зуєва Олена Володимирівна Касперович Дмитро Васильович Кобичев Владислав Валерійович Кобичев Роман Владиславович Кобичева Лариса Миколаївна Кропив'янський Борис Миколайович Пода Денис Валентинович Поліщук Оксана Григорівна Сокур Назар Тимошенко Андрiй Iванович Третяк Володимир Iлліч Черняк Дмитро Миколайович Шкурупій Олег Юрійович popup.nrat_date 2020-04-02 Close