期刊
CHINESE PHYSICS B
卷 22, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/22/5/056201
关键词
non-hydrostatic stress; ruby fluorescence pressure scale; diamond anvil cell
资金
- Defense Industrial Technology Development Program of China [B1520110001]
- National Natural Science Foundation of China [10874158]
- Project of China Academy of Engineering Physics [2010A0101001, 2008A0101001]
Effect of non-hydrostatic stress on X-ray diffraction in a diamond anvil cell (DAC) is studied. The pressure gradient in the sample chamber leads to the broadening of the diffraction peaks, which increase with the hkl index of the crystal. It is found that the difference between the determined d-spacing compressive ratio d/d(0) and the real d-spacing compressive ratio d(r)/d(0) is determined by the yield stress of the pressure transmitting media (if used) and the shear modulus of the sample. On the basis of the corrected experiment data of Mao et al. (MXB86), which was used to calibrate the most widely used ruby fluorescence scale, a new relationship of ruby fluorescence pressure scale is corrected, i.e., P = (1904/9.827) [(1 + Delta lambda/lambda(0))(9.827) - 1].
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