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20 January 2004 Development of novel radiation remote-sensing method based on laser spectroscopic measurement of radiation-induced radicals
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Abstract
For monitoring of intense radiation fields, such as around nuclear reactors, high energy accelerators, it is requested to develop a reliable radiation sensing method with high radiation resistance. As one of the promising methods, we propose a novel radiation remote-sensing method based on high sensitive cavity ring-down (CRD) laser spectroscopic measurement of radiation induced radicals. To verify the detection principle, we have made basic experiments on the CRD spectroscopic measurement of the radiation induced ozone concentration in the air irradiated by 60Co gamma-rays, while we have also developed the calculation model to estimate the yields of radiation induced radicals by solving simultaneous rate equations numerically. Through comparison between the experiments and the calculations, we have confirmed the detection principle and the validity of the calculation model, where the results show that the detectable range for the absorbed dose rate is from 4.8x10-2 to 3.2 Gy/s with time resolution of 35 sec by controlling the flow rate of the irradiated air.
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Hideki Tomita, Kenichi Watanabe, Jun Kawarabayashi, and Tetsuo Iguchi "Development of novel radiation remote-sensing method based on laser spectroscopic measurement of radiation-induced radicals", Proc. SPIE 5198, Hard X-Ray and Gamma-Ray Detector Physics V, (20 January 2004); https://doi.org/10.1117/12.506447
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