Accession Number : AD0642019

Title :   USE OF LASER RADIATION TO DETERMINE SCANNING FUNCTIONS; AND LINE WIDTHS AND INTENSITIES OF NU 2 WATER VAPOR LINES.

Descriptive Note : Final rept. 1 Mar 65-28 Feb 66,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD LAB OF ASTROPHYSICS AND PHYSICAL METEOROLOGY

Personal Author(s) : Sica,Louis ; Aryeh,Y. Ben

Report Date : 01 SEP 1966

Pagination or Media Count : 80

Abstract : Measurement of the correlation function at a slit in the case of an Hg source by the method of Beran and Parrent gives results which are in agreement with Hopkins' concept of an 'effective source.' Results using a laser-integrating sphere source indicate that it may be used interchangeably with an ordinary 'incoherent' source for scanning function calibration. Absorption spectra of pure water vapor and mixtures of water vapor with air were measured, in wings of the nu-2 band at 400K and 540K. Vibration rotation interaction in this band was measured by relative intensities of rotational lines. Line widths of the rotational transitions for self broadening were found to decrease with a temperature rise: for broad and strong lines approximately inversely proportional to absolute temperature.

Descriptors :   (*INFRARED SPECTROPHOTOMETERS, CALIBRATION), (*LASERS, INFRARED SPECTROSCOPY), (*WATER VAPOR, BAND SPECTRA), INFRARED SCANNING, ILLUMINATION, INSTRUMENTATION, STATISTICAL FUNCTIONS, INTERFEROMETERS, AIR, ABSORPTION SPECTRA, LINE SPECTRA, INTENSITY, TEMPERATURE

Subject Categories : Astrophysics
      Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE