α粒子间接探测技术原理简介

The Profile of an Indirect Detection Technology Principle of Alpha Particles

介绍了一种α粒子间接探测技术原理,解决某些场合直接测量α粒子的难题。α粒子在空气中产生的离子数与α粒子的注量和能量之积成正比,通过收集α粒子在空气中产生的电离离子的方法,来间接测量α粒子,根据所测电离电流估算α核素的活度。根据测量原理,设计制作了一套间接测量α粒子的实验装置,并进行了实验验证。结论表明间接α测量技术原理可行,测量结果可靠,对α粒子有较好的响应。

In some place it is difficulty to measure alpha particles directly.So a indirect measurement principle for particles is introduced,which solves the problem.Ions are produced when alpha particles transport in the air.The number of ions is proportional to the product of particles’ fluence and energy.So the alpha particles can be indirectly detected by collecting these ions.Then according to the ionization current,we can estimate the activity of alpha particles.Based on the measurement principle,a set of indirect measurement experiment device for alpha particles was designed and made.It has been validated by experiment.Indirect alpha measurement technology principle is practicable.The measured results is reliable and it has good response to alpha particles.