Accession Number:

AD0623837

Title:

INFRARED ABSORPTION IN HEATED AIR FROM VIBRATION-ROTATION BANDS OF NITRIC OXIDE

Descriptive Note:

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA

Personal Author(s):

• Churchill, D. R.
• Hagstrom, S. A.

Report Date:

1964-11-01

Pagination or Media Count:

100.0

Abstract:

The contribution to the spectral absorption coefficient of heated air arising from the vibration-rotation bands of nitric oxide has been calculated with the aid of the SACHA digital computer programs. These band systems were theoretically reconstructed on a line-by-line basis using experimentally determined constants whenever these were available. A magnetic tape spectral atlas containing the reconstructed spectra was then employed by another computer program to calculate the average transmission of infrared radiation through a slab of heated NO whose occupation numbers were chosen to conform to the appropriate air case. Several parameters were varied in the calculation including the line half-width. Results of the calculations are contained in the form of graphs and tables. Computations were made for temperatures from 1000 K- 5000 K and for densities of normal atmospheric to 0.0001 normal. Frequencies covered were between 1200cm and 10,000cm wavelength 1 micron-8.3 micron.

Descriptors:

• *INFRARED RADIATION
• AIR
• OXIDES
• MOLECULAR ROTATION
• VIBRATION
• WAVE PROPAGATION

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE