A simple /and unexpected/ experimental law relating to the number of weak lines in a complex spectrum

Details A simple /and unexpected/ experimental law relating to the number of weak lines in a complex spectrum A simple /and unexpected/ experimental law relating to the number of weak lines in a complex spectrum

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jphb...15l.891l&link_type=abstract

Journal of Physics B - Atomic and Molecular Physics, vol. 15, Dec. 28, 1982, p. L891-L895.

Physics

11

Line Spectra, Plasma Spectra, Spectrum Analysis, Argon, Helium, Intensity, Iron, Random Noise, Stellar Atmospheres, Visible Spectrum

Scientific paper

A study of the intensity distribution of almost 6000 spectrum lines indicates that the number of lines with a given intensity is inversely proportional to the square root of that intensity. The law appears to apply to smaller samples of only a few hundred lines as well as to the complete set. The analysis uses data from an iron hollow cathode lamp and is principally based on lines of Fe I, Fe II, Ne I, Ne II, Ar I, Ar II and He I lines are also included, and the wavelength range is from 2.6 to 0.28 microns. The result is of application both to the calculation of plasma emissivity and to line blanketing in stellar atmospheres.

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