1986 年 55 巻 8 号 p. 2500-2503
The Monte Carlo simulation (MCS) of the electron swarm in a model gas with the momentum-transfer cross section of the form σm(ε)∝εγ (γ=−0.5, 0, and 1), ε being the electron energy, is carried out in order to investigate the recent question raised, in particular, for γ=1 about the conventional two-term expression for the transverse diffusion coefficient DT. The MCS results confirm that the two-term solution of DT (and other swarm parameters) is sufficiently accurate even for γ=1 contrary to the recent doubt; a possible reason for the discrepancy previously revealed between the MCS and two-term values of DT is suggested. The scaling rule for the electron swarm in rare gases derived on the basis of the two-term approximation of the Boltzmann equation in order to reduce the MCS computation time is verified to be valid.
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