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Abstract  

Results of photodecomposition studies of liquid cyclohexane n-octane, n-decane and methylcyclohexane with 7.6 eV photons are reported for various temperatures. In all cases the yield of molecular elimination decreases with decreasing temperature. In the presence of xenon this yield is also found to decrease. The fluorescence decay rate of cyclohexane and methylcyclohexane as obtained from pulse radiolysis measurements, shows a considerable temperature dependence, and is increased in the presence of xenon. The results of the photodecomposition experiments and of the fluorescence experiments are compared and discussed.

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Journal of Radioanalytical and Nuclear Chemistry
Authors:
K. Süvegh
,
A. Vértes
,
L. Wojnárovits
,
G. Földiák
,
L. Liszkai
, and
Zs. Kajcsos

Abstract  

Two bisphenol-A type epoxy resins were irradiated by electron beam and studied afterwards by positron lifetime spectroscopy. An interesting result is that despite the considerable amount of free-radicals no inhibition of positronium formation was observed in the two epoxies. Nevertheless several serious differences were detected between the studied polymers. The results suggest that the radiation-resistant properties of epoxies depend strongly on the amount of the curing agent.

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