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Chinese Journal of High Pressure Physics  > 2014  >  28(6): 691-698.
XUE Tao, ZHOU Xian-Ming, LI Jia-Bo, ZENG Xiao-Long, YE Su-Hua, HUANG Jin, LI Jun, DAI Cheng-Da. Real-Time Absorption Spectrum Measurements of Deformation-Induced Point Defects in Single Crystal MgO[J]. Chinese Journal of High Pressure Physics, 2014, 28(6): 691-698. doi: 10.11858/gywlxb.2014.06.008
Citation: XUE Tao, ZHOU Xian-Ming, LI Jia-Bo, ZENG Xiao-Long, YE Su-Hua, HUANG Jin, LI Jun, DAI Cheng-Da. Real-Time Absorption Spectrum Measurements of Deformation-Induced Point Defects in Single Crystal MgO[J]. Chinese Journal of High Pressure Physics, 2014, 28(6): 691-698. doi: 10.11858/gywlxb.2014.06.008
shu

Real-Time Absorption Spectrum Measurements of Deformation-Induced Point Defects in Single Crystal MgO

doi: 10.11858/gywlxb.2014.06.008

  • National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China

  • Received Date: 15 Mar 2013
  • Rev Recd Date: 13 May 2014
    Abstract
  • The purpose of this study is to investigate the effects of deformation-induced defects on optical transparency of MgO single crystal under shock loading.With the nanosecond-time-resolved 40-wavelength radiation pyrometer and shock-compressed in situ light source techniques, transmission spectrums of single crystal MgO shocked along 〈100〉 direction on two-stage gus gun were measured. Spectrums of the measurements ranged from 400 to 800 nm.Curves of absorption coefficients versus wavelengths under ≈50 GPa and ≈70 GPa were obtained.Color center absorption peaks (410, 460, 490, 580 nm assigned to aggregate F type centers; 520 nm to V- center; 660 nm probably to absorption related with interstitial atom) indicate point defects created during shock plastic deformation process.It is for the first time that color centers of point defects were observed in real time.

     

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