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Effect of Pressure in the Gamma Radiolysis of Cyclohexane in the Vapor Phase

✍ Scribed by Hubert Milon; T. Gäumann

Publisher
John Wiley and Sons
Year
1974
Tongue
German
Weight
486 KB
Volume
57
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The vapor phase γ‐radiolysis of cyclohexane has been investigated as a function of pressure, from 100 to 0.5 Torr, in vessels of different dimensions. With decreasing pressure, the yield of hydrogen and substituted cyclohexanes is decreased and the formation of molecules having less than six carbon atoms is enhanced. The curves of yield vs. pressure have a sigmoïd shape from which we define a transition pressure depending only on the dimensions of the vessels, the variation of the yield of a given product being the same for all the vessels. We propose and discuss a simple model of competition between the neutralization of the ions in the volume and their diffusion to the surface where they are neutralized. From the slope of the curve of the inverse of the transition pressure vs. the square of the characteristic diffusion length, we evaluate a maximum life‐time of 68 ms for the ions, using a calculated value of the cyclohexane ions diffusion coefficient.

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