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The quantity range (R) describes the distance that an charged particle travels in matter. Instead of the linear range (in m), often the mass range ρR (in kg/m2) is given. The range is the integral of the reciprocal stopping power (S):

R = ∫ dE/S

Some useful formulas (energy in MeV):

particle material energy (MeV) linear range (cm) mass range (g/cm2)
α-particle air 2 - 10 0.3 E3/2
proton air 1 - 200 E2
electron any 1 - 10 0,5 E

Related quantity:

Last modified:03 March 2024 5.08 p.m.
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