Shock-induced radiation spectra of fused quartz

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  • Ken-ichi Kondo
    Seismological Laboratory, California Institute of Technology, Pasadena, California 91125
  • Thomas J. Ahrens
    Seismological Laboratory, California Institute of Technology, Pasadena, California 91125
  • Akira Sawaoka
    Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Nagatsuta, Midori, Yokohama 227, Japan

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<jats:p>An optical multichannel analyzer is applied to observe shock-induced radiation spectra of fused quartz in the 23–31 GPa shock-pressure range. Characteristics of sample-driver interface strongly influence both intensity and profile of the observed spectra. Brightness and color temperature are determined by an integration of spectral radiance and a fit to the greybody radiation spectrum, respectively. The resultant brightness and color temperature are lower and considerably higher than those estimated by the theoretical calculation, respectively. Some broad but strong line spectra are, however, superimposed onto the continuous greybody radiation spectrum even though the influences of the interface are reduced as much as possible. The line spectra are probably caused by electroluminescence and/or triboluminescence.</jats:p>

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