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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 50, Iss. 2 — Feb. 1, 1960
  • pp: 174–176

New Wavelengths for Some Helium (He I) Lines

WILLIAM C. MARTIN  »View Author Affiliations


JOSA, Vol. 50, Issue 2, pp. 174-176 (1960)
http://dx.doi.org/10.1364/JOSA.50.000174


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Abstract

New vacuum wavelengths for nine lines of He I in the near ultraviolet and visible regions are given. They were obtained by measurement relative to 5462.2707 A and 4359.5625 A of Hg198 I with an evacuated Fabry-Perot interferometer. Liquid-nitrogen cooled helium lamps were used. Interference fringes were obtained for the helium line 5017 A with spacers up to 50 mm in length. The wavelength of this line, which was used as a reference wavelength in some previous work on the Rydberg constant, is found to be 5017.0772±0.0003 A (vac.) relative to the stated values for the two standards.

Citation
WILLIAM C. MARTIN, "New Wavelengths for Some Helium (He I) Lines," J. Opt. Soc. Am. 50, 174-176 (1960)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-50-2-174

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