FLUORESCENCE OF HIGH-PRESSURE RARE-GASES EXCITED BY X-RAY FLASH

In this work, we report on flash X-ray excitation of high pressure pur e 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 usi ng this new excitation means. Such an energetic excitation leads to im portant population of highly excited ionic species. As a consequence t he fluorescence emitted from the rare gases is mainly located in the U V-VUV wavelength domain. The high level of fluorescence observed autho rized time resolved spectroscopy using conventional means. The dominan t feature of the spectra appears to be the second and third continua o f rare gases. The use of this specific technics of excitation leads to an efficient production of heteronuclear ions at high pressure.