关键词: OSL, 职业外照射, MDL, 响应, 不确定度

Abstract: OSL dosimeter is a kind of passive intergrating personal dosimeter used in the monitoring of occupational external exposure dose. Though at present, OSL dosimeter is not used as widely as TLD dosimeter possibly due to the lack of a comprehensive study on OSL dosimeter’s performance and property,OSL dosimeter will get a wide application in our country in the future because of its advantages such as repeatable measurements, good environmental stability, long service life and slow signal decay. In this paper, OSL dosimeter’s minimum detectable level, angle of incidence response, energy response, and linearity response have been reviewed from the experience of using OSL dosimeters in monitoring work. Based on the experimental results, the uncertainty in measurement has been analyzed. The results show that OSL dosimeter’s MDL in one month is 0.04 mSv. The errors caused by angle of incidence response, energy response, linearity response are 1%, -14%, and -4%, respectively. With a 95% confidence interval, relative expanded uncertainty is 11.4%.

Key words: OSL, occupational external exposure dose, MDL, uncertainty