11:00 〜 13:00
[SIT21-P03] Test of density measurement using X-ray absorption method combined laser-heated diamond anvil cell
キーワード：X線吸収法、密度、レーザー加熱式ダイヤモンドアンビルセル
Density measurement of liquid iron alloy is important to understand the planetary liquid core.
The X-ray absorption method is an effective method because it can directly determine the liquid density. We have been developing the X-ray absorption method combined with a laser-heated diamond anvil cell (DAC), and performed test measurements using Fe3C as a solid sample.
In X-ray absorption method, density of sample was obtained from measured incident and transmitted X-ray intensities of the samples using Lambert-Beer law. Fe3C sample and reference material (Ni) were loaded into each hole drilled on a pre-indented Re gasket. Al2O3 single crystal was used as pressure medium. High pressure was generated using a symmetric cell with a lever-arm frame. High temperature was generated using laser heating system. X-ray absorption measurements were conducted with monochromatic X-ray of 30 keV at BL10XU beamline in Spring-8.
The X-ray intensities of samples were measured up to 10 GPa and 1700 K. The ratio of incident and transmitted X-ray changes 0.3% from 300 K to 1700 K. The thickness of the sample was determined as 10um from X-ray intensities after quench.
The X-ray absorption method is an effective method because it can directly determine the liquid density. We have been developing the X-ray absorption method combined with a laser-heated diamond anvil cell (DAC), and performed test measurements using Fe3C as a solid sample.
In X-ray absorption method, density of sample was obtained from measured incident and transmitted X-ray intensities of the samples using Lambert-Beer law. Fe3C sample and reference material (Ni) were loaded into each hole drilled on a pre-indented Re gasket. Al2O3 single crystal was used as pressure medium. High pressure was generated using a symmetric cell with a lever-arm frame. High temperature was generated using laser heating system. X-ray absorption measurements were conducted with monochromatic X-ray of 30 keV at BL10XU beamline in Spring-8.
The X-ray intensities of samples were measured up to 10 GPa and 1700 K. The ratio of incident and transmitted X-ray changes 0.3% from 300 K to 1700 K. The thickness of the sample was determined as 10um from X-ray intensities after quench.