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Radioluminescence (RL) and thermoluminescence (TL) properties of natural quartz samples were compared at several temperatures. Single crystal quartz exhibiting blue-TL (BTL) showed violet-RL (V-RL) and blue-RL (B-RL), both rapidly decreasing to low-intensity levels with X-ray irradiation time. In contrast, volcanic quartz exhibiting red-TL (RTL) showed V-RL and red-RL (R-RL), respectively, decreasing...
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