조사선원에 따른 향신료의 PSL과 TL 검지 특성
Detection Characteristics of PSL and TL Methods in Spices Irradiated with Different Radiation Sources
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초록
The detection characteristics of irradiated spices were investigated depending onradiation sources and doses by photostimulated luminescence (PSL) and Thermoluminescence(TL). 6 kinds of spices (turmeric, onion powder, red pepper, basil, parsley, black pepper) wereirradiated at 0 to 10 kGy under ambient conditions by both a 60Co gamma irradiator and anelectron beam (EB) accelerator, respectively. The PSL analysis showed negative results for nonirradiatedspices, while irradiated spices gave intermediate and positive value, which presentedthe limited potential of PSL technique. In TL measurement, TL glow curves on non-irradiatedsamples appeared at about 300C with low intensity. All irradiated samples were easily distinguishablethrough radiation-specific strong TL glow curves with maximum peak in range of 150~200C. TL ratio (TL1/TL2) obtained by a re-irradiation step could verify the detection result of TL1 glowcurves, showing ratios lower than 0.1 in the non-irradiated sample and higher than 0.1 inirradiated ones. Therefore, in PSL measurement, the identification of irradiated spices showedmore clear results in electron beam irradiated samples. TL analysis showed obvious differencebetween non-irradiated and irradiated samples in gamma ray and electron beam irradiatedsamples.
Abstract
The detection characteristics of irradiated spices were investigated depending onradiation sources and doses by photostimulated luminescence (PSL) and Thermoluminescence(TL). 6 kinds of spices (turmeric, onion powder, red pepper, basil, parsley, black pepper) wereirradiated at 0 to 10 kGy under ambient conditions by both a 60Co gamma irradiator and anelectron beam (EB) accelerator, respectively. The PSL analysis showed negative results for nonirradiatedspices, while irradiated spices gave intermediate and positive value, which presentedthe limited potential of PSL technique. In TL measurement, TL glow curves on non-irradiatedsamples appeared at about 300C with low intensity. All irradiated samples were easily distinguishablethrough radiation-specific strong TL glow curves with maximum peak in range of 150~200C. TL ratio (TL1/TL2) obtained by a re-irradiation step could verify the detection result of TL1 glowcurves, showing ratios lower than 0.1 in the non-irradiated sample and higher than 0.1 inirradiated ones. Therefore, in PSL measurement, the identification of irradiated spices showedmore clear results in electron beam irradiated samples. TL analysis showed obvious differencebetween non-irradiated and irradiated samples in gamma ray and electron beam irradiatedsamples.
참고문헌 (20)
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