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i am using the Beth-Bloch equation to determine the energy deposited by charged particles in matter (namely protons, pions and muons). In the formula, is the number for incident particle charge in relative charge units (i.e. -1 for electron and +1 for a proton), as opposed to in Coulombs (1.6E-19 C)? I seem to get the correct answer when using relative units. Secondly, the only parameter in the Bethe-Bloch formula (the one i’m using anyway) for the incident particle, is its charge. If the charge is in relative units (+/- 1) the equation does not change for a proton, pion or muon, since they all have a squared charge of +1. Does this mean that these three particles deposit the same amount of energy inside matter through ionization? I am interested in very high energies (10 MeV - 10^10 MeV).

Thanks.

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# Bethe Bloch formula

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