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Free-free absorption of infrared radiation in collisions of electrons with neutral rare-gas atomsA relationship between the inverse bremsstrahlung absorption cross section and the electron neutral momentum transfer cross section has been utilized to determine the infrared free-free continuum absorption coefficient for the negative ions of helium, neon, argon, krypton, and xenon. The values of the momentum transfer cross section for this calculation have been obtained from experimental measurements. Analytical expressions for the absorption coefficient have also been developed. From the results of this calculation, it is possible to determine the absorption coefficient per unit electron density per neutral atom for temperatures in the range from 2500 to 25,000 K. The results are compared with those from tabulations of previous calculations and those computed from theoretical values of the phase shifts for the elastic scattering of electrons by neutral atoms.
Document ID
19740039600
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stallcop, J. R.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Publication Information
Publication: Astronomy and Astrophysics
Volume: 30
Issue: 2, Ja
Subject Category
Physics, Atomic, Molecular, And Nuclear
Accession Number
74A22350
Distribution Limits
Public
Copyright
Other

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