APPROXIMATE CONTINUOUS OPACITY CALCULATIONS FOR POLYELECTRONIC ATOMS AT HIGH TEMPERATURES,
Abstract
Approximate formulas derived by Raizer (JETP (USSR) 37:1079, 1959) and modifications thereof for the Rosseland and Planck mean absorption coefficients in high-temperature gases have been compared with Armstrong's results (Lockheed Missiles and Space Div., Palo Alto, Rept. LMSD-4979, July 15, 1959) for nitrogen at 5 and 20 ev for densities varying between 5 x 10 to the 20th power cm to the -3 power and 5 x 10 to the 15th power cm to the -3 power and 1/(5 x 10 to the 15th power cc). Comparison has also been made with results obtained by Bernstein and Dyson (General Atomic Div. of General Dynamics Corp., San Diego, Report GA 848, July 13, 1959) for the Rosseland mean of fluorine at 10 ev in the density range between 10 to the 21st power cm to the -3 power and 10 to the 18th power cm to the -3 power. The modified Raizer formulas are the consistently better approximation formulas and give agreement to about a factor of two with the numerical results over the parameter range quoted above. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1961
- Accession Number
- AD0261520
Entities
People
- R. A. Pappert
- S. S. Penner
Organizations
- General Dynamics