VUV discharge lamp radiation source useful for photoionization detection of pollutants in air

摘要

A vacuum ultraviolet (VUV) discharge lamp radiation source includes a calcium fluoride and/or barium fluoride filter (3) and a xenon-containing gas filling. A radiation source consists of a VUV discharge lamp which has a magnesium fluoride window (2), partially covered with a calcium fluoride and/or barium fluoride filter (3), and which is filled at a total pressure of /}7 kPa with a mixture of helium, krypton and additionally xenon in a Xe/Kr weight ratio of 1/10 to 1/300.