同位素2016，Vol.29Issue(4)：198-203,6.DOI:10.7538/tws.2016.29.04.0198
放射性核素电离空气电子离子对产生率计算
Calculation on the Electron Ion Pair Production Rate of the Radioisotope Ionizing Air
武秀峰 1张利峰 1马俊平 1罗志福1
作者信息
- 1. 中国原子能科学研究院 同位素研究所，北京 102413
- 折叠
摘要
Abstract
The emission of alpha decay and beta decay are widely used in industrial pro-duction for its ability of ionizing air.To evaluate the ability of radioisotope ionizing air, a method to calculate the electron ion pair production rate was established.Energy dep-osition of the ideal radiation source in the air could be obtained through simulating with Monte Carlo method,and then electron ion pair production rate could be calculated. The effect on ionizing air of radiation source shape,energy,activity and particle energy distribution were studied.We found that the electron ion pair production rate was main-ly affected by the activity of radioactive source.However,the particle energy and ener-gy spectrum distribution mainly affect the ionization range and the decay rate of the electron ion pair production rate.Computations for a flat surface coated with 3.7 ×10 6 becquerel alpha radioisotope per square centimeter showed that the largest electron ion pair production rate could be 10 1 1 cm-3 ·s-1 to 10 1 2 cm-3 ·s-1 ,and 10 9 cm-3 ·s-1 to 10 1 0 cm-3 ·s-1 for beta radioisotope with the same activity.This conclusion can provide theoretical guidance for existing related application and developing new application of radioactive source.关键词
放射性核素/电离空气/电子离子对产生率/蒙特卡罗方法Key words
radioisotope/ionizing air/electron ion pair production rate/Monte Carlo method分类
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武秀峰,张利峰,马俊平,罗志福..放射性核素电离空气电子离子对产生率计算[J].同位素,2016,29(4):198-203,6.
