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Photoconductivity threshold energy and photoionization quantum yield of xenon supercritical fluids doped with TMAE (tetrakis-dimethylaminoethylene) were measured as a function of xenon density at 300 K. Density dependence of the photoionization threshold energy was successfully described with the continuum model where the fluid is treated as a uniform continuum.
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Nakagawa et al. (1990) studied this question.
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