{'fraction_non_alphanumeric': 0.02321981424148607, 'fraction_numerical': 0.020123839009287926, 'mean_word_length': 5.046728971962617, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Ionization and charge transfer in proton-helium collisions

Cross sections have been calculated for single ionization in collisions between protons and helium atoms, in the range of projectile energies 25-100 keV. The semiclassical impact parameter method was employed, with a basis comprising 22 states on the (He) target and 29 states on the projectile. Good agreement is obtained with the measurements of Shah et al. (1989). The inclusion of pseudo-continuum states on the helium centre is found to significantly modify the total cross section for capture into the bound states of hydrogen, leading to improved agreement with the measurements.