Abstract
The propagation of electrons in a gas at energies higher than the excitation energy of the K shell of the gas atoms is simulated numerically. Calculations show that, without a field, the penetration depth of the electrons into a gas heavier than nitrogen is limited primarily by their elastic collisions with atomic nuclei. For electrons moving in an electric field, the effect of elastic collisions is that there is no definite electric field strength above which an electron with a given energy will be continuously accelerated. Even in an electric field much stronger than the critical one, only a fraction of electrons are accelerated. The remaining electrons turn back due to elastic collisions and lose their energy in deceleration by the field. In this case, the propagation velocity of the centroid of the electrons tends to a constant value.
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Original Russian Text © A.N. Tkachev, S.I. Yakovlenko, 2006, published in Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 76, No. 5, pp. 42–46.
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Tkachev, A.N., Yakovlenko, S.I. Deceleration and acceleration of fast electrons in a dense gas in an electric field. Tech. Phys. 51, 574–579 (2006). https://doi.org/10.1134/S1063784206050069
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DOI: https://doi.org/10.1134/S1063784206050069