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Localized Vibrations of Substitutional Atomic Hydrogen in KCl and RbCl Studied by ENDOR
Author(s) -
Hoentzsch Ch.,
Spaeth J. M.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220880223
Subject(s) - hydrogen , excitation , atomic physics , vacancy defect , ion , lattice (music) , chemistry , thermal , vibration , molecular physics , materials science , crystallography , physics , organic chemistry , quantum mechanics , meteorology , acoustics
The superhyperfine (shf) interactions of atomic hydrogen trapped on a cation vacancy next to a Ca ++ ion in [110] are measured by ENDOR. The shf interactions increase with increasing temperature. This is explained as due to the occupation of higher modes of the localized hydrogen vibrations. The thermal excitation energy is (17 ± 2) meV for RbCl and (25 ± 2) meV for KCl. A theoretical interpretation of the shf interactions is given including vibrational effects and the lattice distortion of the nearest neighbours.