Abstract
The effect of high-energy, high-flux neutron irradiation on the phonon spectrum and structure of α-quartz is studied using IR reflectivity, Raman scattering, and x-ray diffraction measurements. The results demonstrate that neutron irradiation to a fluence of about 7 × 1019 n/cm2 transfers low-quartz to a state similar in structure to high-quartz. The dynamics and mechanism of the radiation-induced phase transition are discussed in relation to the associated changes in silicon–oxygen bond distances and angles.
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