Fluorescence des gaz rares à haute pression excités par flash X rapide

Abstract

In this work, we report on flash X-ray excitation of high pressure pure rare gases (He, Ne, Ar, Kr, and Xe) and mixture of rare gases. It is shown that high efficiency in energy deposition could be achieved using this new excitation means. Such an energetic excitation leads to important population of highly excited ionic species. As a consequence, the fluorescence emitted from the rare gases is mainly located in the UV-VUV wavelength domain. The high level of fluorescence observed authorized time resolved spectroscopy using conventional means. The dominant feature of the spectra appears to be the second and third continua of rare gases. The use of this specific technics of excitation leads to an efficient production of heteronuclear ions at high pressure.