JETP Letters, Volume 25, Issues 7-12American Institute of Physics., 1977 - Physics |
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absorption Academy of Sciences acoustic American Institute amplitude angle antiferromagnetic approximately atoms axis band beam calculated coefficient corresponding cross section crystal decreases density dependence Eksp elastic electron emission energy equation excited exciton experiment experimental Fermi Fermi surface ferromagnet flux frequency function germanium gluons helium impurity increase inhomogeneous Institute of Physics intensity interaction investigated ions isotopes JETP Lett JETP Letters laser Lebedev Lebedev Physics Institute low temperatures magnetic field mesons metallic molecules nonlinear nsec Nuclear nuclei observed obtained optical oscillations PACS numbers parameters particles phase transition phonon Phys Physics Club Pis'ma Zh plasma Plasma Physics polarization protons pulse quantum quarks radiation region resonance rotation sample scattering Sciences Submitted semiconductor Society of America solitons solution Soviet Astronomy Soviet Journal spectra spectrum spin surface Teor tion USSR Academy vector velocity W/cm² wave wave vector William Koch