Abstract
The effect of reactor irradiation on the IR reflectivity spectrum of α-SiO2 single crystals is studied in a broad range of fast-neutron fluences. Data are presented on the irradiation-induced changes in the spectral characteristics of antisymmetric and degenerate vibrational modes of bridge bonds and in dynamic parameters. Critical lattice dynamics is revealed near the antisymmetric stretching and degenerate modes. The ionic polarizability and dynamic constants of the crystals are shown to be nonlinear functions of neutron fluence. The results are interpreted in terms of radiation damage, a radiation-induced phase transition, and breaking and stretching of some of the silicon-oxygen bonds. A mechanism of radiation-induced structural changes is discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
