Many technologies today require pure gases or standard gas mixtures for or safe and efficient operation. The performance of a CO2-Laser depends not least on the quality of the operating gas used. Inert gas in bulbs increase their life time and performance. Other examples where the use of (inert) gases helps to achieve certain properties are xenon or argon lamps or with krypton insulated windows.
In atomic absorption spectrometry, two different types of radiation sources are used: line source and continuum sources.
Line sources are emitting a line spectrum, and are used as a source of measurement light whose absorption is measured in the flame and used to determine the analyte.
Continuum lamps emit a continuous spectrum. In the conventional AAS deuterium and halogen lamps serve to compensate the underground. As measuring light most of the available sources are not eligible because their intensity is not high enough.
Since the introduction of xenon short-arc lamps (XKBL) is a new type of lamp is available which has such a high density of radiation over the entire relevant spectral region, what will allow the use as a measuring light source in the atomic absorption spectroscopy. This has led to a new variant of the AAS, which is called CS-AAS (Continuous Source AAS). The conventional apparatus realizing the AAS are called LS AAS (for Line Source). Often in the CS-AAS compared to the LS AAS also new types of detectors are used.
A xenon short arc lamp (XKBL) includes xenon under an initial pressure between 5 to 20 bar, which triples about the operation by increasing the temperature. Between the two electrodes, which are only a few millimeters apart, a small, very bright intense arc is formed. This emits a continuous spectrum with a color temperature of 5500 - 6000 K, which is similar to the solar spectrum.