{'fraction_non_alphanumeric': 0.04738760631834751, 'fraction_numerical': 0.018226002430133656, 'mean_word_length': 4.843971631205674, '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}}
Theoretical Studies of the Local Structures and Spin Hamiltonian Parameters for the Cu2+ Centers in Alkali Barium Borate Glasses

The spin Hamiltonian parameters (g factors g||, g and the hyperfine structure constants A||, A) for the Cu2+ centers in alkali barium borate glasses were theoretically studied based on the high-order perturbation formulas of these parameters for a 3d9 ion in a tetragonally elongated octahedron. From the calculations, the ligand octahedra around Cu2+ are suggested to suffer about 9.4%, 10.7%, and 11.1% relative elongation along C4 axis for the alkali barium borate glasses (Li-Ba-B, Na-Ba-B and K-Ba-B, respectively), the results are in good agreement with the observed values. In addition, the negative signs for A|| and A of the studied Cu2+ centers were also suggested in the discussion.