Skip to ContentSkip to Navigation
Education Programmes Other study opportunities Groningen Academy for Radiation Protection


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:16 January 2021 09.54 a.m.
printView this page in: Nederlands