Abstract For precisely estimating dose and elapsed time after an unrecognized high-dose radiation exposure in radiological emergency, applicability of the continuous-wave optically stimulated luminescence (CW-OSL) signals from Mg2SiO4:Tb (MSO) was investigated. Small disks of MSO were irradiated with β-rays from a Sr-90 source and their CW-OSL signals were analysed. The CW-OSL curves obtained by stimulation with a blue light (λ = 458 nm) at 5, 10, 20, 50 and 1119 h after irradiation indicated that they have short- and long-life components; each component was empirically deconvoluted to the sum of two exponential functions. Through repetitive regression analyses on those curves, a practical method for estimating the dose and elapsed time after an unrecognized radiation exposure was proposed. Results of blind tests indicated that the accuracy of absorbed dose estimation using this method was satisfactory while the estimated elapsed times were accompanied with considerable uncertainties.

中文翻译：

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使用来自 Mg2SiO4:Tb 的连续波光受激发光估计未识别的高剂量辐射暴露后的剂量和经过时间

摘要 为了精确估计放射应急中未识别的高剂量辐射暴露后的剂量和经过时间，研究了来自 Mg2SiO4:Tb (MSO) 的连续波光受激发光 (CW-OSL) 信号的适用性。用来自 Sr-90 源的 β 射线照射 MSO 的小圆盘，并分析它们的 CW-OSL 信号。辐照后 5、10、20、50 和 1119 h 用蓝光（λ = 458 nm）刺激获得的 CW-OSL 曲线表明它们具有短寿命和长寿命成分；根据经验将每个分量解卷积为两个指数函数的总和。通过对这些曲线的重复回归分析，提出了一种估算未识别辐射暴露后的剂量和经过时间的实用方法。