Optically stimulated luminescence (OSL) signal properties of pellets from three types of NaCl (two household salts and one analytical grade salt) were investigated for their use in prospective dosimetry. Special attention was given to the OSL signal behaviour with time. The readout protocol was optimised in terms of preheat temperature, and the OSL signal yield of the NaCl pellet with time as well as the fading of the OSL signal with time was investigated. The effects of acute and chronic irradiations were compared. Irradiations and readout were performed using a Risø TL/OSL reader (TL/OSL-DA-15, DTU Nutech, Denmark). The optimal preheat temperature was determined to be 100 ºC, yielding OSL signals similar to a 1 h pause before OSL signal readout. There was no OSL signal fading observed as a function of time, but a decrease in the OSL signal yield of the NaCl pellets with time resulted in an apparent inverse fading when converting the OSL signal to an absorbed dose. For chronic radiation exposures of up to five weeks, the sensitivity of the NaCl pellets was found to be stable. The results of this study show that the use of NaCl pellets for prospective dosimetry is a promising, cost-effective, and accessible complement to commercially available alternatives for accurate absorbed dose determinations.

研究了来自三种类型的氯化钠（两种家用盐和一种分析纯盐）的颗粒的光激发发光（OSL）信号特性，以用于前瞻剂量法。特别注意了OSL信号随时间的行为。在预热温度方面对读出协议进行了优化，并研究了NaCl沉淀的OSL信号产率随时间的变化以及OSL信号随时间的衰减。比较了急性和慢性照射的效果。使用RisøTL / OSL阅读器（TL / OSL-DA-15，丹麦DTU Nutech）进行辐照和读出。最佳预热温度确定为100ºC，产生的OSL信号类似于在读出OSL信号之前暂停1小时。没有观察到随时间变化的OSL信号衰减，但是，当将OSL信号转换为吸收剂量时，NaCl沉淀的OSL信号产量随时间降低会导致明显的反衰落。对于长达五周的慢性辐射照射，发现氯化钠小球的灵敏度稳定。这项研究的结果表明，使用NaCl微丸进行前瞻性剂量测定是一种有前途的，具有成本效益的，可替代商业用途的替代品，可用于确定准确的吸收剂量。