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Title: Electron mobility in liquid and supercritical helium measured using corona discharges : a new semi-empirical model for cavity formation
Authors: Aitken, F.
Li, Z.-L.
Bonifaci, N.
Denat, A.
von Haeften, Klaus
First Published: 4-Nov-2010
Publisher: Royal Society of Chemistry (RSC)
Citation: Physical Chemistry Chemical Physics, 2010, 13 (2), pp. 719-724.
Abstract: Electron mobilities in supercritical and liquid helium were investigated as a function of the density. The mobilities were derived from I(V) curves measured in a high-pressure cryogenic cell using a corona discharge in point-plane electrode geometry for charge generation. The presented data spans a wide pressure and temperature range due to the versatility of our experimental set-up. Where data from previous investigations is available for comparison, very good agreement is found. We present a semi-empirical model to calculate electron mobilities both in the liquid and supercritical phase. This model requires the electron–helium scattering length and thermodynamic state equations as the only input and circumvents any need to consider surface tension. Our semi-empirical model reproduces experimental data very well, in particular towards lower densities where transitions from localised to delocalised electron states were observed.
DOI Link: 10.1039/C0CP00786B
ISSN: 1463-9076
eISSN: 1463-9084
Version: Publisher Version
Status: Peer-reviewed
Type: Article
Rights: Copyright © 2011,the Owner Societies. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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