Range of alpha particle
When an alpha particle travels through air, it loses energy by ionization of air molecules. For every air molecule ionized, approximately 5.6 x 10^-18 J of energy is lost by the alpha particle. Suggest a typical value for the range of an alpha particle in air. Hence calculate the number of air molecules ionized per mm of the path of the particle, given that the initial energy of alpha particle is 9.2 x 10^-13 J
The answer is 3300.
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