Abstract
The transport properties of excess electrons in non polar gases or liquids give important information on the electronic states in a disordered medium and on the relationship among the electron-atom interactions and the properties of the fluid. Anomalous density effects on electron mobilities were discovered in a number of compressed gases1. A negative density effect, i. e., the density-normalized zero-field mobility μ 0 N of electrons decreases with increasing the gas density N, is shown by gases such as He and Ne, whose interaction with electrons is dominated by short-range repulsive exchange forces and whose scattering length a is positive. On the other hand, a positive density effect, i. e., μ 0 N increases with N, is shown by Ar, Kr, and Xe, whose scattering length is negative owing to the overwhelming contribution of the long-range attractive polarization forces to the atom-electron interaction.
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Borghesani, A.F., Santini, M., Lamp, P., Buschhorn, G. (1994). Electron Mobility in High-Density Argon Gas. In: Christophorou, L.G., James, D.R. (eds) Gaseous Dielectrics VII. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1295-4_12
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DOI: https://doi.org/10.1007/978-1-4899-1295-4_12
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