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JOURNAL OF APPLIED PHYSICS
卷 89, 期 1, 页码 662-668出版社
AMER INST PHYSICS
DOI: 10.1063/1.1328410
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The hydrostaticity of a helium-pressure medium has been evaluated with powder x-ray diffraction techniques up to 77 GPa at room temperature. The relative change of d values and the broadening of diffraction peaks have been investigated for three cubic substances, CeO2, the high-pressure rocksalt phase of ZnO, and Au. I observed no evidence of nonhydrostaticity of the helium-pressure medium to at least 50 GPa. The powder x-ray diffraction method has been compared with the ruby fluorescence method in order to get a better understanding of nonhydrostatic stress conditions. (C) 2001 American Institute of Physics.
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