HR: 0830h
AN: V31D-0969    [PDF]
TI: Nuclear Magnetic Resonance Spectroscopy in the Diamond Anvil Cell
AU: * Okuchi, T
EM: t.okuchi@gl.ciw.edu
AF: Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015 United States
AU: * Okuchi, T
EM: t.okuchi@gl.ciw.edu
AF: Graduate School of Environmental Studies, Nagoya University, Nagoya, 464-8601 Japan
AU: Hemley, R J
EM: hemley@gl.ciw.edu
AF: Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015 United States
AU: Mao, H
EM: mao@gl.ciw.edu
AF: Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015 United States
AB: Nuclear magnetic resonance (NMR) of materials under pressure provides unique information on structure and dynamics, complementing many scattering, diffraction, and other spectroscopic methods. High-pressure NMR measurements can be important for Earth and planetary materials, particularly disordered systems, under deep interior conditions. Previous studies have pointed out the great potential of combining NMR with diamond-anvil cell (DAC) techniques but studies to date have been generally limited because of the low signal levels involved. In a effort to extend this technique, we have set up a NMR system operating at 200 MHz proton resonance frequency with a wide-bore superconducting magnet in which a specially designed nonmagnetic DAC$^{1}$ is installed. This system is capable of measuring spin relaxation in liquid samples in the DAC at high pressures. Preliminary results, including signal/noise ratios in different rf coil configurations around the diamond anvils, will be reported. $^{1}$T. Okuchi, Phys. Earth Planet. Inter., HPMPS special issue, to be published
DE: 3994 Instruments and techniques
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting