{'fraction_non_alphanumeric': 0.0199501246882793, 'fraction_numerical': 0.004987531172069825, 'mean_word_length': 5.373015873015873, '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}}
A theory of low-energy electron impact excitation of dipole-allowed molecular vibrations. An application to acetylene, C2H2

The article outlines a theory for the direct excitation of dipole-allowed vibrations, v=0 to v=1, in polyatomic molecules. The molecule is modelled by the Hartree-Fock function in contrast to earlier treatments using a point dipole model. The discussion retains the practice of these earlier treatments in using the Born approximation for the scattering amplitude. The theory is applied to the acetylene molecule. The results show an improvement over the point dipole model between values of the vibrational transition moments inferred from infrared intensity measurements and values of differential cross sections for low-energy electron impact excitation of these vibrations.