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Information × Registration Number 0224U000529, 0121U111442 , R & D reports Title Development of radiation-resistant diamond-containing scintillation composite for new generation colliders popup.stage_title Head Ivakhnenko Serhii O., д.т.н. Registration Date 09-01-2024 Organization V. Bakul Institute of superhard material of the National Academy of Sciences of Ukraine popup.description2  Samples of diamond powder for scintillation composite were synthesized by spontaneous synthesis using a cubic six-punch press and Fe-Ni-C, Fe-Co-Mg, Fe-Co-Ti and Fe-Co-Zr solvent alloys. The yield in one growing cycle was from 80 to 250 crystals with a size of 0.2–2.4 mm. It was established, that the H3 center, which consists of a vacancy combined with nitrogen (N-V-N), with a width of the emission zone of 480–650 nm, is a dominant in the photoluminescence, cathodoluminescence, and X-ray luminescence spectra of diamond crystals at room temperatures. The luminescence decay of the H3 center within the temperature range of 77–700 K is about 16–17 ns. It was established that the H3 center is formed in synthesized diamonds of Ia, Ib, and IIa types by means of any radiation with subsequent annealing at temperatures above 500°C, regardless of the growth system. Better luminosity characteristics were obtained in terms of activity, distance and emission location for detectors made using scintillators polished at various stages, compared to detectors made with a depolished scintillator. It was established, that scintillator cracking occurs more often under lower irradiation dose (approximately 100–200 Mrad) than under high dose irradiation (up to 500 Mrad). It was established that, compared to standard YSO:Ce scintillators, composite scintillators made on the basis of single-crystal powders have better stability under irradiation with fast (8.3 MeV) electrons. Diamonds synthesized in the Fe-Ni-C system have the highest cathodoluminescence, X-ray luminescence and radiation luminosity. Product Description popup.authors Boiaryntsev Andrii Yu. Grushko Volodymyr I. Mickiewicz Eugene I. Tsysar Maksym O. popup.nrat_date 2024-01-09 Close