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目的分析氟化锂（ＬｉＦ） 探测器在测量质子时的厚度效应。方法在比较理想与合理的假设下，利用探测器吸收剂量的定义推导计算。结果质子能穿透探测器时，探测器厚度效应不明显：当质子能量大于１２ ＭｅＶ 时，只是当探测器厚度接近于质子射程时其厚度效应才较为明显，小于１２ ＭｅＶ 时，探测器没有厚度效应；质子不能穿透探测器时，探测器厚度效应较为显著。结论 测量低能质子的剂量时，应选用较薄的ＬｉＦ 探测器，以避免其厚度效应的影响。
Objective To analyze the thickness effect of lithium fluoride (LiF) detector when measuring proton. Under the ideal and reasonable assumption, the method is deduced from the definition of detector absorbed dose. Results When the proton energy penetrates the detector, the thickness effect of the detector is not obvious: when the proton energy is greater than 12 MeV, the thickness effect is only obvious when the detector thickness is close to the proton range. When the proton energy is less than 12 MeV, the detector has no thickness Effect; proton can not penetrate the detector, the detector thickness effect is more significant. Conclusion When measuring the doses of low-energy protons, a thinner LiF detector should be chosen to avoid the effects of its thickness effect.