Abstract: The factors affecting ESR dosimetry of window glass were explored for better application in personal dose estimation and accident grade determination. The effect of sample processing on the background signal and the radiation signal was studied by grinding the window glass into different particle sizes. The window glass samples were given different dose of radiation, and were stored under different conditions. The effects of temperature, light, and time on the ESR signal were observed. The dose response curves and the minimum detection doses of window glass from different manufacturers were compared. The results show that the sample processing has no obvious effect on the radiation signal, but it will produce mechanical signal; the higher the temperature, the more unstable the radiation signal. High-temperature heating (≥200 ℃, ≥5 min) can decay the ESR radiation signal to background level. The results of samples(transparent bag-lamplight storage,and black bag storage) are approximately the same: after 11 hours, the signal intensity reduced about 9%; after 150 hours, the signal intensity reduced about 18%.Signal decayed 17% after 11 hours and decayed 38% after 150 hours for samples with transparent bag-sunlight storage. The samples under the three storage conditions all reached to a stable state after about 150 hours; the ESR signal of the window glass sample at g=2.0057 is linearly related to the absorbed dose, and the linear correlation coefficients varied with different manufacturers. The minimum detectable dose is 4-5 Gy. Therefore, in the practice of window glass as dosimeter, a reasonable dose assessment procedure should be set up for more accurate results.

Key words: window glass, ESR, radiation, dose response