Abstract
A versatile technique for X-ray absorption at high pressure at E>5.5 keV is discussed together with its application in L III-absorption spectroscopy of rare earth systems. Using Be-gasketed pressure cells, the present device combines the advantages of the Bridgman method, very high pressures and low compression force with the high transmission of Be-windows. A sufficiently good signal/noise ratio at typical measuring times was obtained, using the photon flux of the unfocused beam line EXAFS I of LURE. The pressure can be determined internally via the ruby-luminescence technique. A light-pipe system allows simultaneous recording of the X-ray spectra and the R-lines of the excited ruby, optimizing the limited beam time available for the user.
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