![]() A low pressure of argon in the lamp insures that the line width from the hollow cathode lamp is less than the line width of the absorbing species. Collisions of excited state sputtered atoms with argon atoms will lead to broadening of the output of the hollow cathode lamp and potentially lead to the same problem described above with the use of a continuum source. The radiation source emits radiation of a wavelength that is. HOLLOW CATHODE LAMP ELAPSED TIME RECORDING SYSTEM - diagram, schematic. Hollow cathode lamp are the most common radiation source. The pressure of the argon is low to minimize collisions of argon atoms with sputtered atoms. HOLLOW CATHODE LAMP ELAPSED TIME RECORDING SYSTEM - diagram, schematic, and image 05. With this understanding we can ask why the hollow cathode lamp has a low pressure of argon filler gas. Therefore, hollow cathode lamps, which emit intense narrow lines of radiation specific to the element being analyzed, are needed for atomic absorption measurements. Download Scientific Diagram FIG 4 - uploaded by Anthony Lagalante Content may be subject to copyright. The hollow cathode is made of a thermionic material (LaB 6 ) to facilitate. Reducing the slit width on a continuum source to a level that would provide a narrow enough line to respond to atomic absorption would reduce the power so that it would not be much above the noise. We developed a steady-state high-density plasma source by applying a hollow cathode to a cascade arc discharge device. from publication: Char acter ization of a modified hollow-cathode dischar ge plasma by optical means. The problem with reducing the slit width is that it reduces the number of photons or source power reaching the sample. Cathodeon 37mm hollow cathode lamps are suitable for most commercial atomic absorption instruments, many of which are listed below. Download scientific diagram The schematic diagram of the cavity-hollow cathode. It depends on the construction of the hollow-cathode lamp and is proportional to. What is the problem with reducing the slit width of the monochromator to get a narrower line? Intensity of hollow-cathode lamp is an important factor in determining the signal noise ratio at the detector. Atomic absorption line superimposed onto the overall output of a continuum source/monochromator system. ![]()
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