Deterioration of imaging plate by proton irradiation and an evidence of its recovery

A. Nohtomi,T. Sakae,T. Terunuma,R. Kohno,Y. Takada,Y. Hayakawa,A. Maruhashi,K. Yasuoka

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT（2000）

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摘要

An imaging plate (IP) was excessively irradiated by 250 MeV proton beam up to 4.3 x 10(13) protons/cm(2) in order to examine the resultant radiation damage. As a function of proton fluence, variations in photo-stimulated luminescence (PSL) signals were evaluated by comparing with the region without previous extensive proton irradiation on the same IF. Notable deterioration of PSL signal was found for the fluence more than 5 x 10(12) protons/cm(2). Furthermore, partial recovery of the deterioration was evidently observed, which was promoted by keeping the IP at 50-70 degrees C. (C) 2000 Elsevier Science B.V. All rights reserved.

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关键词

clinical proton beam,upper limit of repeatable use,imaging plate (IP),radiation damage,deterioration of photostimulated luminescence (PSL) signals,recovery of IP

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