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Charge transport in liquid and solid argon.

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posted on 2015-11-19, 09:17 authored by Lewis Sidney Miller
Short pulses of electrons of 40 keV energy have been used to generate electron-hole pairs in solid and liquid argon. The drift velocity of electrons has been measured at applied fields of 100 to 15 in the solid, and 40 to 70 in the liquid. For both the solid and the liquid, the drift velocity is determined principally by acoustic mode scattering. The low field mobilities (?.) are: In the solid, the mobility has been measured as a function of temperature. The results are not inconsistent with ?. ? T-3/2, except near the triple point, where the variation of mobility is more rapid. In both liquid and solid there is a transition at intermediate fields to a region in which v (v = drift velocity, E = electric field). This behaviour is explained in terms of the Shockley hot electron theory; agreement with the theory is good. At high fields there is a further saturation; in the liquid, for E < 10, this is in good agreement with the theoretical drift velocities calculated by Lekner. (Lekner's theory has not yet been applied to the solid). At fields above 10, the experimental drift velocities are greater than those predicted by the theory. In the liquid, the drift of positive ions has been observed; their mobility is about 1.0 to 1.2.10-3 cm2.s-1.v-1, for fields of 4 to 60 In the solid, no drift of positive holes could be detected.


Date of award


Author affiliation

Physics and Astronomy

Awarding institution

University of Leicester

Qualification level

  • Doctoral

Qualification name

  • PhD



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