Accession Number:

AD0618399

Title:

Opacity of High-Temperature Air

Descriptive Note:

Technical rept. for 15 Jan 1962-15 Nov 1964

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA

Report Date:

1965-06-01

Pagination or Media Count:

312.0

Abstract:

A new calculation of the opacity of high-temperature air kT 1 - 20 eV is carried out. Line bound-bound transitions are included and LS term splitting of configurations is accounted for in the n 2 and 3 levels. The primary purpose of the calculation is to remove the hydrogenic approximation to the dominant photoelectric and line transitions. In place of the hydrogenic approximation, Hartree-Fock-Slater matrix elements are used for the line transitions. For the photoelectric transitions, a combination of the Burgess-Seaton extension of the Coulomb approximation, and a high-energy acceleration-matrix-element Born approximation is employed. Comparisons are carried out with experiment and with previous calculations. A review and discussion is presented of the statistical mechanics of ionized gases, and some new results pertinent to the calculation of occupation numbers are presented.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE