冲击压缩下NaCl单晶光辐射特性的研究

 用光辐射技术研究了氯化钠单晶冲击压缩下的光辐射特性，得到了在45～70 GPa压力范围内NaCl单晶的光谱吸收系数随冲击压力的变化，把这一结果与Kormer等人的结果比较，发现在较低压力下与Kormer等人的结果相差较少，当压力较高时实验结果比Kormer等人的结果约大1个数量级。并用实验结果计算了电子迁移率随冲击温度的变化，得到的结果与Ziman理论基本一致，从而解决了一直来Kormer的实验结果与Ziman理论不一致的困难，进一步证明了Ziman理论的正确性。

OPTICAL RADIATION PROPERTIES OF NaCl CRYSTAL UNDER SHOCK COMPRESSION

The optical absorptances of crystal NaCl under shock compression from 40 GPa to 70 GPa were measured using optical radiation technique. Comparing with Kormer's results, our results are almost as ten times as Kormer's results when shock pressure is about 60 GPa. The results show that the possible reason for causing this difference is that the time resolution of experimental record system used by Kormer was not fast enough. The changing of free-carrier mobility with shock temperature was calculated by using the experimental data. The results show that our results have a good agreement with Ziman's theoretical results. The disagreement existed in Kormer's experimental results and Ziman's theoretical results all the time was resolved.