Abstract
Absolute radiation measurements for 40 different elements are carried out on commercial line sources under comparable conditions. These sources include hollow cathode and high-intensity lamps, metal vapour lamps and concentrated glow discharges. These are superior to other sources with respect to radiance without disturbing line broadening, even when comparing them with electrode-less HF discharges. An attempt is made to find a quantitative expression for the importance of the radiance for the limit of detection of atomic absorption, both for the discrete and the continuous background radiator. With consideration of a spectral line without self-reversal there results an effective radiation temperature of 4000–5000°K at maximum, depending on the element.
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