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4
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84927251869
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K. F. Ness, Ph.D. thesis, James Cook University of North Queensland, 1985.
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5
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0006932129
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Matrix Elements of the Boltzmann Collision Operator in a Basis Determined by an Anisotropic Maxwellian Weight Function including Drift
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(1980)
Australian Journal of Physics
, vol.33
, pp. 449
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Kumar, K.1
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12
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84927251868
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H. Tagashira, Proceedings of the XV International Conference on Phenomena in Ionized Gases, Minsk, USSR, 1981 (unpublished).
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14
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84927251867
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We use the symbol alpha in this work to denote the rate of attachment of electrons to neutral molecules. Elsewhere, e.g., in Ref. 30, it is called an ``attachment collision frequency'' and a different symbol is used, e.g., νa.
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15
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84927251866
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The first use of such terminology seems to have been by K. F. Ness, Honors thesis, James Cook University, 1977, who discussed both attachment cooling and the analogous phenomenon of diffusion cooling, plus cross effects.
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16
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84927251865
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We continue to use alpha as the symbol for reaction rate, in this case, ionization production rate. Sometimes it is referred to as an ``ionization collision frequency,'' and designated by νi.
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20
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84927251849
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Ion Diffusion Unit, Internal Rept., Australian National University, 1983 (unpublished).
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MacMachon, D.R.A.1
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23
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84927251847
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G. L. Braglia, L. Romano, and M. Diligenti, Phys. Rev. A 26, 3689.
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25
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84927251845
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Haddad in Ref. 22 above has also considered anisotropic scattering.
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46
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84927251844
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To date only the CO2 bench mark model [R. W. Crompton (private communication)] has presented serious problems for the moment solution. The problem was a lack of convergence in the calculation of DL for E/n0=40 Td. For E/n0>40 Td, curlep bar >1.8 eV. At curlep app1.5 eV there is a minimum in the elastic cross section and for curlep>4 eV all five inelastic cross sections in the model decrease rapidly with energy. It is believed that the effect of this is to make the distribution function extremely non-Maxwellian for E/n0>wig40 Td, hence the lack of convergence for the moment method. Perhaps a moment solution incorporating a nonzero drift velocity parameter would be successful under such circumstances (as suggested in Ref. 4). We also note that the spline method of Pitchford et al. (Ref. 16) was unable to give a satsifactory DL value [R. W. Crompton (private communication)].
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48
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84927251843
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Skullerud in Ref. 44 restricts his comments to nonextreme mass ratios.
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