在动态气氛中生长的优化 Bi4Si3O12 闪烁晶体,用于未来的粒子物理实验

IF 5.8 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
S. Tkachenko , I. Gerasymov , D. Kurtsev , O. Viahin , D. Kofanov , B. Grynyov , P. Mateychenko , E. Bryleva , L. Martinazzoli , J. Delenne , L. Roux , R. Cala’ , E. Auffray , O. Sidletskiy
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Optimized Bi4Si3O12 scintillation crystals grown in dynamic atmosphere for future particle physics experiments
This work deals with the optimization of bismuth silicate, Bi4Si3O12 (BSO) scintillation crystals as candidates for future high energy physics experiments at colliders involving the registration of both scintillation and Cherenkov light. Crystals with a high transparency in UV-band and a high timing resolution are required for this application. Czochralski process was employed for BSO crystal growth in Pt crucibles in a dynamic growth atmosphere. After the growth of a series of crystals in air, as well as mixed Ar-air static and dynamic atmospheres, it was shown that the mixed atmosphere minimizes Bi2O3 evaporation and reduces the amount of Pt dissolved in the melt by several times. This caused the reduction in the number of foreign inclusions in the grown crystals, providing a transparency of over 70 % in the > 300 nm range, a light output of up to 2140 ph/MeV, an energy resolution of 21.5 % at 662 keV γ-rays, while a coincidence time resolution was improved from 148 to 125 ps.
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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