Photoemission of thin films of uracil, citosine, timine, adenine, quanine, DNA, RNA, nucleosides, nucleotides in the spectral region 125-250 nm is investigated. Photoemission work functions are determined, their values are in the interval of 5.7-6.1 ev. The dependence of photoemission efficiency on wave length for uracil, timine, DNA, RNA are measured. The results of this work with earlier data on luminescence yields are discussed. Possibility of radiation recombination process for wave lengths shorter than 160 nm is suggested.
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