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在320nm波长条件下,测定的Ce~(4+)离子溶液的线性摩尔吸收系数为559.1 m~2/mol,在吸光度为0.1～1.6(ABS)范围内,线性好于0.5％。剂量计本底的重复性好于1％。测定的Ce~(3+)离子的辐射化学产额C值为2.39×10~(-7)mol/J(±1.2％),剂量转换因子K为724.8Gy。实验表明温度每升高1℃,G值下降0.25％,剂量计的量程为4～35kGy。对铈 剂量计照射的后效应进行了实验,照射后放置0.4h至34d是稳定的。对稀释50倍后的铈剂量计溶液做了光效应实验,避光放置3h未发生吸光度变化,而不避光放置1h吸光度就发生明显变化。通过比对和应用证实了测定结果准确可靠,铈剂量计可作为传递剂量计和标准剂量计使用。
The linear molar absorptivity of the Ce 4+ ion solution measured at 320 nm was 559.1 m 2 / mol and its linearity was better than 0.5% in the absorbance range of 0.1-1.6 (ABS). Repeatability of dosimeter background better than 1%. The measured C ~ value of Ce ~ (3+) ion was 2.39 × 10 -7 mol / J (± 1.2%) and the dose conversion factor K was 724.8 Gy. Experiments show that for each increase in temperature 1 ℃, G value decreased by 0.25%, dosimeter range of 4 ~ 35kGy. After the effect of cerium dosimeter irradiation experiments were conducted, placed 0.4h to 34d after irradiation is stable. After diluted 50 times the dose of cerium dosimeter solution to do a light effect experiment, place the dark place 3h did not absorb the change, but not dark place 1h absorbance changed significantly. Through the comparison and application confirmed the determination result is accurate and reliable, the Ce dosimeter can be used as transfer dosimeter and standard dosimeter.