W values and radial dose distributions for protons in TE-gas and air at energies up to 500 MeV.

Abstract

The dosimetry of charged-particle beams is frequently performed by measuring the ionization yield produced in gas-filled ionization chambers and converting it into absorbed dose using the mean energy W expended in a gas per ion pair formed, or its differential value omega for the filling gas. Because of the increasing importance of proton therapy and the… (More)

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