Monte Carlo calculation of the energy-loss spectra for fast H2+ molecular ions transmitted through thin foils

Abstract

We report calculations of the energy-loss spectra for 25-300 keV amu-1 H2+ ions transmitted through carbon and aluminium foils. At 25 keV amu-1 the mean energy-loss of transmitted H2+ ions is approximately 15% smaller than that of two protons at the same velocity, whereas at 300 keV amu-1 it becomes 10% greater. When compared to those of two uncorrelated protons, the width of the energy-loss distribution appears to increase with a decrease of the bombarding energy, becoming 3-5 times larger at 25 keV amu-1 for molecules transmitted through aluminium and carbon foils, respectively.