کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9845879 | 1526522 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Functional approach to lead tungstate (PWO) scintillators in development of their fabrication technology
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
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چکیده انگلیسی
The problem of fabrication of lead tungstate (PWO) scintillation crystals with reproducible characteristics is approached by distinguishing two main functions of the scintillator: (i) conversion of the high-energy irradiation to light photons, and (ii) guiding of the light through the crystal to the detector. Optical transmittivity and, thus, the lightguiding capability of the crystal are mainly influenced by inclusions of W1âyLyO3âx. Variation of tungsten valency in the inclusions under irradiation or thermal treatment influences the transmittivity and, thus, the external light yield. The efficiency of radiation conversion into light is mainly governed by crystal structure. Radiative recombination in scheelite-type PbWO4 results in emission in the blue region. The green luminescence component is shown to be caused by tungstenite-type regions, which occur in the surface layer under certain conditions of thermal treatment. The influence of the surface modification on the lightguiding properties of PWO scintillators is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 537, Issues 1â2, 21 January 2005, Pages 185-188
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 537, Issues 1â2, 21 January 2005, Pages 185-188
نویسندگان
S. Burachas, S. Beloglovsky, D. Elizarov, I. Makov, Yu. Saveliev, N. Vassilieva, M. Ippolitov, V. Manko, S. Nikulin, A. Nyanin, A. Vasiliev, A. Apanasenko, G. Tamulaitis,