Abstract

Measurements of iron arc spectra have been made with Pachen-Runge spectrographs and a specially designed photoelectric photometer of the ac ratio type allowing continuous scanning and recording. The temperature and self-absorption present in different parts of the arc, and in the arc under different operating conditions, have been determined, and are presented for use in determining which lines are self-absorbed under given conditions. Some unexplained mechanism in the arc causes deviation from equilibrium values of the intensities of all lines within multiplet 68. This mechanism does not operate in the furnace. Corrected values are given for some f values given in the literature. Additional measurements of the arc are now under way for the calculation of high-excitation f values.

© 1959 Optical Society of America

Forty-Five Relative f Values for High Excitation Iron Lines from the dc Arc Spectrum

Ray Hefferlin
J. Opt. Soc. Am. 49(10) 948-949 (1959)

Arc Spectrum of Germanium*†

Kenneth L. Andrew and K. W. Meissner
J. Opt. Soc. Am. 49(2) 146-161 (1959)

Intensity Measurements in the Arc Spectrum of Nickel

Roland L. Heid and G. H. Dieke
J. Opt. Soc. Am. 44(5) 402-410 (1954)

Characteristics of a Combination Discharge and Its Applicability in Spectrochemical Analysis of Metals

H. E. Biber and S. Levy
J. Opt. Soc. Am. 49(4) 349-355 (1959)

Photometry of the Optical Pyrometer and Its Use below 800°C

D. R. Lovejoy
J. Opt. Soc. Am. 49(3) 249-253 (1959)