Track structure calculations of low-energy protons in water

The paper describes the development of a new Monte Carlo track structure code PHIST which generates low-energy proton tracks below 0.3 MeV/u in water vapour. All primary interactions were taken into account. Cross sections for proton and hydrogen impact were obtained from experimental data for water vapour targets. Where data were lacking the existing experimental data were fitted and extrapolated. The tracks of secondary electrons were generated using the electron track code KURBUC. (author)