Accession Number:

AD0760130

Title:

The Absorption by H20 Between 1630 and 2245/cm (6.13 - 4.44 micrometer)

Descriptive Note:

Semiannual technical rept. no. 1

Corporate Author:

PHILCO-FORD CORP NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s):

• Burch, Darrell E.
• Gryvnak, David A.
• Pembrook, John D.

Report Date:

1973-01-01

Pagination or Media Count:

33.0

Abstract:

The absorption by samples of H2O and H2O N2 has been studied between 1630 and 2245cm. Spectral curves of transmittance have been obtained for samples covering a wide range of pressures with temperatures between 308K and 428 K. The emphasis has been on continuum absorption in approximately 30 narrow windows where most of the absorption results from lines centered more than 1cm from the point of absorption. Comparison of the results with calculated values based on published line parameters indicates that the extreme wings of H2O lines absorb more than Lorentz-shaped lines of the same intensity and half-width. The continuum absorption decreases with increasing temperature at a faster rate than is predicted by simple theory on line shapes.

Descriptors:

• *INFRARED SPECTRA
• *WATER VAPOR
• ABSORPTION SPECTRA
• MIXTURES
• NITROGEN
• PRESSURE
• TEMPERATURE

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE