Iwanami S, Oda N
Int J Radiat Biol Relat Stud Phys Chem Med. 1986 Oct;50(4):743-51. doi: 10.1080/09553008614551131.
To elucidate the characteristics of the action of tritium beta-rays, the following parameters are derived: electron slowing down spectra of primary electrons (beta-rays) and delta-rays in a medium containing tritiated water; and frequency distributions for the microdosimetric quantity j (number of effective primary events per track per target), fj, for nanometer-size targets exposed to tritiated water. Features of the radiation quality of tritium beta-rays are discussed by comparing the present results with those for 60Co gamma-rays and 7 MeV electrons. It is concluded that, although tritium beta-rays, 60Co gamma-rays, and 7 MeV electrons are classified as the same low l.e.t. radiation, the radiation quality of tritium beta-rays is considerably different from those of 60Co gamma-rays and 7 MeV electrons, and has specific features such as a high average l.e.t., a small total electron fluence per unit absorbed dose, and a different microdosimetric distribution, fj, for nanometer-size targets.
为了阐明氚β射线的作用特性，推导了以下参数：含氚水介质中初级电子（β射线）和δ射线的电子慢化能谱；以及暴露于氚水的纳米尺寸靶标的微剂量学量j（每径迹每靶标的有效初级事件数）的频率分布fj。通过将当前结果与60Coγ射线和7MeV电子的结果进行比较，讨论了氚β射线的辐射品质特征。得出的结论是，尽管氚β射线、60Coγ射线和7MeV电子都被归类为相同的低传能线密度辐射，但氚β射线的辐射品质与60Coγ射线和7MeV电子的辐射品质有很大不同，具有诸如平均传能线密度高、单位吸收剂量的总电子注量小以及纳米尺寸靶标的微剂量学分布fj不同等特定特征。
