THEORETICAL STUDY OF OPTICAL PROPERTIES. PHOTON ABSORPTION COEFFICIENTS, OPACITIES, AND EQUATIONS OF STATE OF LIGHT ELEMENTS, INCLUDING THE EFFECT OF LINES. Volume 1
Abstract
Photon absorption coefficients and mean opacities were calculated for H, Be, C, N, Al, and Si over a temperature range from 1.5 to 34 ev and a density range from about 0.1/cc downward. Contributions to the absorption coefficient from free-free (inverse-bremsstrahlung), bound-free (photoelectric), and bound- bound (line-absorption) processes are included, as is Compton scattering. Certain thermodynamic properties are given. An improved recipe for pressure ionization is derived which is approximately valid at nondegenerate densities for any ratio of Debye length to ion-sphere radius. Line absorption is evaluated using recent results from pressure-broadening theory and a representation of line series which is computationally as simple as the statistical method. Results show that lines increase the Rosseland mean opacity by a factor which can be neary ten and which is insensitive to moderate changes in line widths.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1961
- Accession Number
- AD0268236
Entities
People
- John C. Stewart
- Kedar D. Pyatt Jr.
Organizations
- General Dynamics