Laser techniques in high-pressure geophysics

Details Laser techniques in high-pressure geophysics Laser techniques in high-pressure geophysics

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987sci...237..605h&link_type=abstract

Science (ISSN 0036-8075), vol. 237, Aug. 7, 1987, p. 605-612. Research supported by the Carnegie Institution of Washington.

Physics

Geophysics

28

Geochemistry, Geophysics, Laser Heating, Laser Spectroscopy, Raman Spectra, Design Analysis, High Pressure, Luminescence, Melting Points, Pressure Dependence

Scientific paper

Laser techniques in conjunction with the diamond-anvil cell can be used to study high-pressure properties of materials important to a wide range of problems in earth and planetary science. Spontaneous Raman scattering of crystalline and amorphous solids at high pressure demonstrates that dramatic changes in structure and bonding occur on compression. High-pressure Brillouin scattering is sensitive to the pressure variations of single-crystal elastic moduli and acoustic velocities. Laser heating techniques with the diamond-anvil cell can be used to study phase transitions, including melting, under deep-earth conditions. Finally, laser-induced ruby fluorescence has been essential for the development of techniques for generating the maximum pressures now possible with the diamond-anvil cell, and currently provides a calibrated in situ measure of pressure well above 100 gigapascals.

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