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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 57, Iss. 5 — May. 1, 1967
  • pp: 645–650

Optical Properties of Sodium in the Vacuum Ultraviolet

J. C. SUTHERLAND, E. T. ARAIAWA, and R. N. HAMM  »View Author Affiliations

JOSA, Vol. 57, Issue 5, pp. 645-650 (1967)

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The index of refraction, n, of sodium films evaporated onto quartz substrates has been determined in the spectral region from 420 to 2000 Å from interference patterns observed in the reflected beam and from the critical angle marking the onset of “total reflection.” The growth of an oxide layer on the surface of a film is shown not to alter appreciably the position of interference maxima and minima. The real part of the dielectric constant was consistent with a nearly-free-electron model. The effective volume—plasmon energy was found to be 5.694±0.06 eV, in agreement with the values determined from electron-energy-loss experiments.

J. C. SUTHERLAND, E. T. ARAIAWA, and R. N. HAMM, "Optical Properties of Sodium in the Vacuum Ultraviolet," J. Opt. Soc. Am. 57, 645-650 (1967)

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