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一、知识综述1.天然放射现象中放出的射线一般有三种,三种射线的本质及性质如下.a射线:速度约为光速的1/10的氦核流,带两个单位的正电荷,贯穿能力很弱,电离作用很强.β射线:速度约为光速的十分之几的电子流,带一个单位的负电荷,贯穿能力很强,电离作用较弱.γ射线:波长极短的电磁波,不带电,贯穿能力最强,电离作用很弱.
First, knowledge review 1. There are generally three types of radiation emitted in the natural radiation phenomenon. The nature and properties of the three types of radiation are as follows. a. Rays: a helium core flow with a velocity about 1/10 of the speed of light, with a positive charge of two units. The penetrating ability is very weak, and the ionization is very strong. β-rays: The electron flow is about ten times the speed of light, with one unit of negative charge. The penetration ability is very strong and the ionization is weak. γ-rays: Electromagnetic waves with very short wavelengths , without charge, the strongest penetration, ionization is very weak.