γ-Radiolysis of cyclohexane with electron scavengers. VII. Perfluorocyclohexane and perfluorobenzene as electron scavengers

Abstract

The room temperature, liquid phase radiolysis of cyclohexane has been investigated using perfluorocyclohexane (C6F,2) and perfluorobenzene (C,F,) as electron scavengers. Yields of the respective monohydrofluorocarbons were investigated over several orders of magnitude scavenger concentration. The CGFIlH yield from the C,F,,-cyclohexane system has previously been shown to result from electron capture by CsF12. The data over the extended concentration range were used to calculate a total ion yield of 4.3 _+ 0.2 G units and a free ion yield of 0.14 _+ 0.02 G units. With CsF6 as an electron scavenger, hydrogen, cyclohexene, and dicyclohexyl yields were all reduced. However, CGF5H yields were much lower than the

Radiolysis of cyclohexane with perfluorocyclohexane at very high dose rates

“…Hydrogen yields were reduced on adding PCH much as they were on adding N 2 0 to cyclohexane under similar conditions (7), but cyclohexene and dicyclohexyl were also reduced. Undecafluorocyclohexane was produced, although in smaller yields than at conventional dose rates (4), and a new product, C6Fl,.C,H11, was produced in measurable yield. assumed that geminate recombination is unaffected by high dose rates (7).…”

“…It scavenges electrons efficiently Experimental and one C-F bond is broken for every electron Sources and purification of cyclohexane and PCH scavenged (2-4). Because dissociation of the have been described (4). Irradiations were carried out in PCH anion is prohibitively endothermic (5), metal cells of the type described by Boyd et al (7).…”

“…Irradiations were carried out in PCH anion is prohibitively endothermic (5), metal cells of the type described by Boyd et al (7). These cells were irradiated with a Febetron 705 pulsed electron C-F bond breaking probably in the source (Field Emission Corp.), and the adsorbed dose neutralization step (4,6). The mechanism for this was determined by adiabatic calorimetry (8).…”

“…The mechanism for this was determined by adiabatic calorimetry (8). bond breaking has been the subject of some Analytical techniques have been described (4,9). In the speculation and several mechanisms have been absence of authentic standards, the area sensitivity of the proposed ( 2 , 3, 6).…”

Effect of an external electric field on the yield of trapped electrons in a γ-irradiated hydrocarbon glass

“…Therefore, it seems reasonable to assess the value of G, in hydrocarbon glasses on the basis of the value of G, in hydrocarbon liquids. Although the value of G, in hydrocarbon liquids is not exactly known, it is considered to lie in the range 4-5 from several investigations (13)(14)(15)(16)(17)(18) reduces to the simple exponential distribution function for n -, co. The mean range, F, of thermalized electrons can be derived from eq.…”