Energy calibration of a high-resolution inelastic x-ray scattering spectrometer.
The energy scale of a triple-axis x-ray spectrometer with meV energy resolution based on perfect silicon crystal optics is calibrated, utilizing the most recent determination of the silicon lattice parameter and its thermal expansion coefficient and recording the dispersion of longitudinal acoustic and optical phonons in a diamond single crystal and the molecular vibration mode in liquid nitrogen. Comparison of the x-ray results with previous inelastic neutron and Raman scattering results as well as with ab initio phonon dispersion calculations yields an overall agreement better than 2%.
Verbeni
Roberto
R
European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France.
D'Astuto
Matteo
M
Krisch
Michael
M
Lorenzen
Maren
M
Mermet
Alain
A
Monaco
Giulio
G
Requardt
Herwig
H
Sette
Francesco
F
D002138:Calibration; D003460:Crystallization; D018130:Diamond / Q000737:chemistry; D004867:Equipment Design; D007368:Interferometry; D009584:Nitrogen / Q000737:chemistry; D055095:Optics and Photonics; D055585:Physical Phenomena; D012542:Scattering, Radiation; D012825:Silicon / Q000737:chemistry; D013053:Spectrophotometry / Q000295:instrumentation*; D013696:Temperature; D014732:Vibration; D014965:X-Rays
D018130:Diamond; D009584:Nitrogen; D012825:Silicon