EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-189-C8-192
DOI: 10.1051/jphyscol:1986835
EXAFS MEASUREMENT UNDER HIGH PRESSURE BY DIAMOND ANVIL CELL
K. OHSUMI1, S. SUENO2, I. NAKAI3, M. IMAFUKU3, H. MORIKAWA4, M. KIMATA2, M. NOMURA1 et O. SHIMOMURA51 Photon Factory, National Laboratory for High Energy Physics (KEK), Oho-machi, Tsukuba-gun, Ibaraki 305, Japan
2 Institut of Geoscience, University of Tsukuba, Japan
3 Department of Chemistry, University of Tsukuba , Japan
4 Research Laboratory of Engineering Materials, Tokyo Institut Technology, Japan
5 National Institut for Research in Inorganic Materials
Abstract
EXAFS spectra of materials under high pressure were successfully obtained for K-absorption edges of Fe, Co and Ni atoms by making use of synchrotron radiation together with the diamond anvil cell technique. A newly developed goniometer stage with a remote controlled motor was found to be useful for adjusting the position of a miniature diamond anvil cell for an X-ray beam. The present study revealed that an experimental system consisting of a Si(111) monochromator, a scintillation counter and a pair of normal 1/8 carats diamond anvils worked well for the measurement of Fe, Co and Ni atoms. For further measurement of absorption spectra of atoms with lower atomic number than Fe, a specially designed thinner diamond anvil or higher brightness synchrotron radiation source would be required.