TWO QUANTUM STATISTICAL TREATMENTS OF SPECTRA LINE SHAPES EMITTED FROM PLASMAS.
Abstract
A study was made of hydrogenic energy levels as modified by a plasma. This was done through a perturbation expansion of the partition function of the multicomponent plasma, which gives rise to a pseudo-Schroedinger equation. The level shift and width were calculated using the random phase approximation for the dielectric function of the plasma. The results yield a small negative energy shift and a width that is proportional to n squared, where n is the principal quantum number. A formal treatment is given of radiative transitions between two levels in which the dipole-dipole correlation function is developed in a perturbation expansion along the lines of recent work on transport coefficients. The results yielded a line width which agreed with a more general form given by Baranger, except for an interference term between elastic scattering amplitudes, which appeared to be a negligible contribution. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1964
- Accession Number
- AD0603003
Entities
People
- H. E. Dewitt
- T. Nakayama