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Information × Registration Number 0223U005562, 0122U002206 , R & D reports Title Investigation of rare nuclear and sub-nuclear processes popup.stage_title Head Kasperovych Dmytro V., Кандидат фізико-математичних наук Registration Date 25-12-2023 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description2  New limits on the partial half-lives of natural platinum isotopes relative to alpha decays accompanied by gamma quanta have been obtained, in particular, the sensitivity for alpha decays of 190Pt and 192Pt to the 2nd excited levels of the daughter nuclei and 198Pt to the main level has been improved by 2–5 times. The next stage of measurements with a thin platinum sample has been started, which will significantly increase the efficiency of registration for the processes searched for due to the low self-absorption in the sample. Improved constraints on the half-lives of natural osmium isotopes relative to alpha decays accompanied by gamma quanta escape have been obtained. The experimental limitations of the half-life for the alpha decay of 184Os and 186Os exceed theoretical predictions by 2–15 times, which indicates the need to improve the theoretical description of the processes. New data on radioactive contamination of zinc tungstate scintillation crystals have been obtained: the total activity of alpha-radioactive nuclides is (0.20–0.41) mBq/kg, in particular the activity of 210Po (0.14–0.19 mBq/kg), 232Th (0.04–0.10 mBq/kg) have been measured. Limits of < (0.0012–0.15) mBq/kg have been set for other alpha radioactive nuclides. An experiment to search for rare nuclear processes in natural neodymium isotopes has been completed. A number of improved limits on the alpha decays of natural isotopes of neodymium have been obtained, exceeding previously known constraints by 2–3 orders of magnitude, and several limitations have been established for the first time. A technique has been developed for precise measurement of the half-life of 214Po. An experimental setup with a liquid scintillator and a data collection system with high time characteristics was built. Product Description popup.authors Klavdienko Volodymyr R Romaniuk Mariia V. Sokur Nazar V Tinkova Vira S. popup.nrat_date 2023-12-25 Close