{'fraction_non_alphanumeric': 0.04034969737726967, 'fraction_numerical': 0.014122394082044385, 'mean_word_length': 4.573033707865169, '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': 5, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Classical trajectory Monte Carlo model calculations for ionization of the uracil molecule by impact of heavy ions

The ionization of the uracil molecule induced by heavy-ion impact has been investigated using the classical trajectory Monte Carlo (CTMC) method. Assuming the validity of the independent-particle model approximation, the collision problem is solved by considering the three-body dynamics of the projectile, an active electron and the molecule core. The interaction of the molecule core with the other two particles is described by a multi-center potential built from screened atomic potentials. The cross section differential with respect to the energy and angle of the electrons ejected in the ionization process has been calculated for an impact of 3.5 MeV u−1 C 6 + ions. Total electron emission cross sections (TCS) are presented for C q + ( q = 0 − 6 ) and O 6 + projectiles as a function of the impact energy in the range from 10 keV u−1 to 10 MeV u−1. The dependence of the TCS on the charge state of the projectile has been investigated for 2.5 MeV u−1 O q + ( q = 4 − 8 ) and F q + ( q = 5 − 9 ) ions. The results of the calculations are compared with available experimental data and the predictions of other theoretical models: the first Born approximation with correct boundary conditions (CB1), the continuum-distorted-wave–eikonal-initial-state approach (CDW-EIS), and the combined classical-trajectory Monte Carlo–classical over-the-barrier model (CTMC-COB).