BULK SUPERHEATING OF SOLID KBR AND CSBR WITH SHOCK-WAVES
BULK SUPERHEATING OF SOLID KBR AND CSBR WITH SHOCK-WAVES
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DOI：
10.1103/physrevlett.71.2931
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发表时间：
1993-11-01
影响因子：
8.6
通讯作者：
BROWN, JM
中科院分区：
文献类型：
--
作者：
BONESS, DA;BROWN, JM
我们观察到KBr在22 ~ 33 GPa和CsBr在30 ~ 42 GPa的激波单晶中存在650 K量级的大块固体过热，并持续到DELTAt > ~ 500 ns。这些实验采用纳秒级分辨率，12通道光学热分析法测量晶体中前进激波前沿的温度，同时使用稀疏超越技术测量声速。这种新颖的测量组合可以几乎连续地确定透明晶体的Hugoniot温度与压力或密度。
We have observed bulk solid superheating of the order of 650 K and persisting for DELTAt > 500 ns in shocked single crystals of KBr at 22 to 33 GPa and CsBr at 30 to 42 GPa. These experiments use nanosecond-resolution, twelve-channel optical pyrometry to measure the temperature of the advancing shock front in the crystal, and the rarefaction-overtake technique to simultaneously measure sound velocity. This novel combination of measurements allows a virtually continuous determination of Hugoniot temperature versus pressure or density for transparent crystals.