V.U.V. Photoionization process in non polar dielectric liquids

The correlation between the thermal electron mobility, μe, the radiation-induced free-ion yield Gfi at zero applied electric field, and the most probable thermalization distance b of secondary electrons, is examined for 52 different pure non-polar dielectric liquids for which data have been reported in the literature. It is shown that, in liquids for which μe > 10−1 cm2 V−1 s−1, the variation of Gfi with μe is well represented by a relation of the type [Formula: see text] where n ≈ 0.31. The connection between Gfi and μe can be described through the product εsb, where εs is the static dielectric constant of the intervening liquid. In particular, 1/εsb is shown to correlate with both μe and Gfi. Analysis of these correlations allows us to estimate an upper limit of μe that can be attained in a room-temperature dielectric liquid, information of utmost importance from the point of view of application to liquid ionization detectors.

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Ion mobilities in non-polar dielectric liquids: silicone oils

IEEE Transactions on Dielectrics and Electrical Insulation ◽

10.1109/tdei.2015.005036 ◽

2015 ◽

Vol 22 (5) ◽

pp. 2424-2427 ◽

Cited By ~ 6

Author(s):

Werner F. Schmidt ◽

Katsumi Yoshino

Keyword(s):

Polar Dielectric ◽

Dielectric Liquids ◽

Silicone Oils

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Cluster Structure of Salt Solutions in Polar Dielectric Liquids

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1084.97 ◽

2015 ◽

Vol 1084 ◽

pp. 97-106 ◽

Cited By ~ 1

Author(s):

Igor Shamanin ◽

Mishik Kazaryan ◽

Dmitry Sidko

Keyword(s):

Electric Field ◽

External Electric Field ◽

Cluster Structure ◽

Field Frequency ◽

Polar Dielectric ◽

Dielectric Liquids ◽

Electric Field Frequency ◽

Solvated Ions ◽

Solvent Molecules ◽

Mixed Salts

The aim of the study is to demonstrate that separation of solvated ions in solution of mixed salts under the action of external periodic electric field is caused by the formation of clusters consisting of solvent molecules and surrounding the ions. Such clusters have the dimensions of about 0.1 µm. The study includes the theoretical estimation of cluster dimensions and experimental determination of the external electric field frequency that gives rise to the separation of solvated ions. The results testify that placing the volume distributed electric charge of ion into dielectric liquid is accompanied by the formation of supramolecular particles. We called such particles “clusters”. The linear dimensions of clusters significantly exceed the first and the second radii of solvation (approximately 1 Angstrom) and amount to nearly 0.1 µm. At such sizes, inertial properties of clusters and their natural frequencies may allow controlling their movement by applying an external electric field to solution.

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