Radiation resistance and optical properties of lead fluoride Cherenkov crystals

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• 作者：Achenbach ; P. ; Altarev ; I. ; Grimm ; K. ; Hammel ; T. ; von Harrach ; D. ; Hoffmann ; J. ; Hofmann ; H. ; et. al.
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：1998
• 出版时间：October 21, 1998
• 年：1998
• 卷：416
• 期：2-3
• 页码：357-363
• 全文大小：421 K

文摘

Optical properties of large size lead fluoride (PbF₂) crystals of three different manufacturers and their degradation caused by ⁶⁰Co γ-radiation have been investigated. Transmission losses have been systematically studied at absorbed energy doses between 0.1 and 7 kGy. Several radiation induced absorption bands have been observed. Optical bleaching with light of wavelengths der=0 SRC=/images/glyphs/BMF.GIF> 365 nm has been found very effective to restore the original characteristics even after repeated irradiations. This observation together with the high density and the ultraviolet extended transmission make PbF₂ an excellent choice for high rate and high resolution e.m. calorimetry.