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Charged‐particle stopping in crystals
Author(s) -
Khodyrev V. A.,
Sirotinin E. I.
Publication year - 1983
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.2221160228
Subject(s) - excited state , electron , excitation , atomic physics , core electron , physics , charged particle , valence electron , lattice (music) , valence (chemistry) , mean free path , proton , perturbation theory (quantum mechanics) , quantum mechanics , ion , acoustics
Abstract The energy loss by a charged particle moving along a given path in the crystal lattice is calculated in terms of quantum perturbation theory. In calculating the contribution of excitations with lowenergy transfer, the sum rule is used. The highly‐excited states are described in a quasi‐classical approximation. The results obtained with these approximations coincide in the intermediate region of excitation energy. The results obtained allow the electrons of the core and the valence electrons to be treated from a unified standpoint. The averaging of the obtained expression for Δ E ( b ) over the random impact‐parameteri distribution leads to the Lindhard‐Scharff formula. The calculated dependence of the mean relatve proton‐energy loss upon the dechanneling depth is compared with available experimental data.