Temperature dependence of the Raman-scattering intensity in quartz crystals with artificially introduced defects

It is established that the temperature dependence of the Raman-scattering intensity in synthetic quartz irradiated by fast neutrons (with no alluminum impurities or the corresponding color centers) is anomalous, as in natural irradiated crystals including aluminum defect tetrahedra. It is suggested that amplification of the anharmonicity of the lattice vibrations of the crystal is associated with the formation of a large amount of structural point defects (and corresponding color centers) of nonimpurity type under the action of fast neutrons.