中文摘要：

释光测年在等效剂量测定过程中都会对测年样品进行热处理，其中预热是最为主要的热处理过程，但由于随之产生的热迁移和热激活等问题，使得预热处理及其条件的设置是应用释光准确测年的关键之一。本文主要是将目前常规测年中应用的双程序单片再生释光法的红外释光（IRSL）和红外之后的蓝光释光（Post-IR OSL）中的几种预热温度和实验剂量后的cut-heat温度进行不同组合，然后进行了若干黄土样品等效剂量的测定。测定结果表明：等效剂量表现了对预热温度一定程度的依赖性，尤其是对实验剂量后cut-heat温度的依赖性更加明显，一般随cut-heat温度的升高而增大；在200-300℃预热温度范围内，200-240℃的cut-heat温度下测定的等效剂量出现了一个坪区，且红外释光和红外之后的蓝光释光测得的结果最为接近。二者在以上预热温度范围内在200-240℃的cut-heat温度条件下释光信号的感量变化方向一致、变幅较小可能是两种释光条件下测定的等效剂量较为一致的主要原因，而这种感量变化在整个测定过程中没有被完全校正又导致了等效剂量随cut-heat温度的变化。

英文摘要：

The thermal treatment in the equivalent-dose estimation often is carried in the OSL dating, and pre-heat is a main thermal treatment. Due to which will originate the problems of thermal transfer and thermal activation, the thermal treatment and the setup of their conditions are key problems influencing the accuracy of OSL dating. The paper combinated the temperature of pre-heat and cut-heat used in the routine measurement of IRSL and Post-IR OSL, and then estimated the equivalent-dose of several loess samples. The estimated result presents that the equivalent-dose depends on the heat temperature, especially depends on the cut-heat temperature, which is to say that the equivalent-dose increases with the cut-heat temperature; a plateau of equivalent-dose appears when using the 200-240℃ cut-heat in the range of 200-300℃ pre-heat, and the equivalent-doses estimated by IRSL and Post-IR OSL respectively are close to each other, which resulted from the similar sensitivity change direction of optical stimulated signals and its smaller change range in the measurement cycles using the combinated temperature of preheat and cut-heat, and the incomplete calibration of sensitivity change of optical stimulated signals in the whole measurement cycles caused the variation of estimated equivalent-dose corresponding to the cut-heat temperature.