Lateral dose distribution of proton beams at energies from 4 to 11 MeV

The distribution of imparted energy deposited at distance from the axis of a proton beam, i.e. the lateral distribution of absorbed dose, is determined by measurement of the light emission in nitrogen at the wavelengths of 391.4 nm and 337.1 nm in single photon counting technique. Results for the proton energies 4, 8 and 11 MeV are given.