FERMI-DIRAC AVERAGES OF THE FREE-FREE HYDROGENIC GAUNT FACTOR
The effects of very high electron densities on the absorption of radiation by free-free electron transitions were studied. The absorption coefficient is expressed in terms of a dimensionless quantity known as the gaunt factor. The nonclassical effect of exclusion is accounted for by averaging the energy dependent hydrogenic gaunt factors of Latter and Karzas against the Fermi- Dirac electron distribution. Fermi-Dirac averages of the hydrogenic gaunt factor are tabulated over an appropriate range of thermodynamic states and photon energies. It is demonstrated that whenever the densities are high enough to require the use of the Fermi-Dirac averages, the effect of electron screening becomes important. It is shown how the Fermi-Dirac gaunt factor integrals may be altered to account for the effect of electron screening. (auth)
- Research Organization:
- RAND Corp., Santa Monica, Calif.
- DOE Contract Number:
- AT(29-1)-1477
- NSA Number:
- NSA-15-010346
- OSTI ID:
- 4095656
- Report Number(s):
- RM-2580(AEC)
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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