摘要
本实验室建立了60Co和137CSγ射线参考辐射场,并研制了不同体积的系列球形石墨空腔电离室,用于测定辐射场的空气比释动能率。对于30cm3和50cm3电离室,估计总不确定度为0.74%,与国内照射量标准符合得相当好,与日本国家标准(ETL)比对结果也在1%内相符。用这些电离室对本实验室所建立的60CO和137CSγ射线参考辐射场空气比释动能率(或照射量率)进行测定,与1990年MCD-100电离室测量结果都在2%内相符。
Co and 137Cs gamma ray reference radiation field has been established and a series of spherial graphite cavity chambers of different volume for 60Co and 137Cs gamma ray airKerma determination have been developed in this laboratory. For 30 cm3 and 50 cm3 chambers, the total uncertainty is evaluated to be 0. 74%, which is in good agreemeet with thenational exposure standards and within 1% as compard with Japanese National Standard in Electrotechnical Laboratory (ETL) for both 60Co and 137Cs.The reference radiation beams used for radiation protection dosimeters' calibration inthis laboratory are measured with these chambers. The results consist with that of 1991measurement within 2 %.
出处
《辐射防护》
CAS
CSCD
北大核心
1996年第2期88-97,共10页
Radiation Protection
关键词
钴60
铯137
空气比释动能
β射线辐射
Cavity Ionization Chamber, Air Kerma, Exposure, Reference Radiation, ̄(60)Co, ̄(137)Cs