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Neutron Scattering on Anomalous Fluctuations of Phonons
Author(s) -
van Trong Nguyen
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.2220880116
Subject(s) - phonon , scattering , physics , neutron scattering , condensed matter physics , inelastic neutron scattering , neutron , cross section (physics) , inelastic scattering , instability , phonon scattering , correlation function (quantum field theory) , crystal (programming language) , small angle neutron scattering , nuclear physics , optics , quantum mechanics , computer science , dielectric , programming language
The process of inelastic neutron scattering in crystal is investigated in the case, where the crystal is suggested to be an electron–phonon system placed in an external radiation field. The cross‐section of one‐phonon scattering process is calculated by using the two‐particle correlation function of phonon. It is shown that near the borderline of parametric instability region the correlation function of phonon and the cross‐section of neutron consequently take anomalously large values.