The photochemical primary processes of ethylene oxide in the vacuum ultraviolet region have been studied with emphasis on the dependence on energy. It has been found that the decomposition into methyl and formyl radicals is the main process while the decomposition into ethylene and oxygen atoms is also important at shorter wavelengths.1470Aring;1744Aring;1783 sim; 1845Aring;C2H4Oplus; h ngr;rarr;CH3plus;CHOlpar;COplus;Hrpar;111lpar;Irpar;rarr;Oplus;C2H4lpar;C2H2plus;H2rpar;0.70.10.1lpar;IIrpar;rarr;H2plus;lpar;CH2COrpar;0.10.1middot;middot;middot;lpar;IIIrpar;rarr;CH3CHO0.2middot;middot;middot;middot;middot;middot;lpar;IVrpar;rarr;CH2plus;HCHO0.2middot;middot;middot;middot;middot;middot;lpar;Vrpar;The formation of excited ethylene in Process (II) which decomposes into acetylene and hydrogen has been suggested.
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