Laboratory EXAFS in a Dispersive Mode

A LABORATORY DISPERSIVE MODE SPECTROMETER, CAPABLE OF OPERATING IN EITHER THE ANALYSING CRYSTAL TRANSMISSION MODE (KAMINGA ET AL.) OR A SYMMETRIC OR ASYMMETRIC REFLECTION MODE, IS DESCRIBED. EXAFS SPECTRA OF RE AND REO2, OBTAINED IN THE TRANSMISSION MODE, ARE COMPARED FAVOURABLY WITH THOSE FROM A SCANNING SPECTROMETER AT A SYNCHROTRON SOURCE. FACTORS AFFECTING RESOLUTION, INTENSITY AND BACKGROUND IN THIS TRANSMISSION MODE ARE DISCUSSED. EXPERIMENTS WITH ASYMMETRIC REFLECTION GEOMETRIES, WHICH HAVE SHOWN BOTH IMPROVED RESOLUTION FOR XANES AND REDUCED COLLECTION TIMES, ARE REPORTED. METHODS OF REDUCING PROBLEMATIC BACKGROUNDS DUE TO MULTIPLE BRAGG REFLECTIONS AND COMPTON SCATTERING ARE PROPOSED.

MERLINI Alfonso;  BALERNA A.;  MOBILIO S.;  GIARDINA Maria; 

1995-03-15

JRC4795

https://publications.jrc.ec.europa.eu/repository/handle/JRC4795,