A SPECTROSCOPIC MEASUREMENT OF THE RESONANT ABSORPTION OF MICROWAVE ENERGY BY OXYGEN IN THE 2.5-MILLIMETER WAVELENGTH REGION

Abstract

A microwave spectrometer was used to measure the dependence of the oxygen component of absorption in the vicinity of 118. 75 Gc. The variations of line shape, both width and intensity, for a wide range of atmospheric pressures are described by the reported measurements. For 100% oxygen at a temperature of 300 K, the measurements associated with the best fit of the Van VleckWeisskopf shape, yield a line-width parameter of delta nu over P equals 2.08 Mc/mm Hg for P is equal to or lesser than 4 mm Hg and delta nu over P equals 1.90 Mc/mm Hg for 4 mm Hg for P is equal to or lesser than 760 mm Hg, and a peak intensity which increases very slightly with pressure from 6.5 db/km at 3.5 mm Hg to 7.0 db/km at 500 to 760 mm Hg.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1963
Accession Number
AD0414361

Entities

People

  • A. E. Schulze

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Atmospheric Attenuation
  • Barometric Pressure
  • Coherent Radiation
  • Collision Broadening
  • Electromagnetic Fields
  • Electromagnetic Radiation
  • Electromagnetic Spectra
  • Experimental Data
  • Magnetic Fields
  • Measurement
  • Oscillators
  • Radio Frequency
  • Resonant Frequency
  • Spectra
  • Spectroscopy
  • Uncertainty Principle

Fields of Study

  • Physics

Readers

  • Mathematics or Statistics
  • Optical Physics and Photonics.
  • Snow Cover Descriptors for Reptiles and Their Illustrations.