{'fraction_non_alphanumeric': 0.045454545454545456, 'fraction_numerical': 0.04090909090909091, 'mean_word_length': 4.796052631578948, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 1, '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}}
Cross sections for l-selective electron capture into the He+ (n=4) shell in intermediate energy collisions of He2+ with H and H2

This paper shows the extensions of the authors' previous work on absolute cross sections for electron capture into He+ (4l) states, produced in collisions of He2+ with atomic and molecular hydrogen, to higher impact energies (27-132 keV amu-1) than used before (2-13 keV amu-1). The cross sections have been deduced from photon emission profile measurements along the ion beam axis, detecting the He II(n=4 to n=3) radiation at a wavelength of 4686 AA. The results for collisions with atomic hydrogen generally show reasonable agreement with the atomic orbital calculations of Fritsch (1989) below 50 keV amu-1 and at the highest impact energies used (E>or=100 keV amu-1) approach the data of the distorted wave approximation by Belkic et al. (1990).