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Electron spin emission phenomena
Author(s) -
Atkins P. W.
Publication year - 1973
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270050510
Subject(s) - multiplet , radical , relaxation (psychology) , electron , chemistry , transient (computer programming) , spectral line , spin (aerodynamics) , photochemistry , emission spectrum , atomic physics , chemical physics , analytical chemistry (journal) , physics , organic chemistry , thermodynamics , quantum mechanics , psychology , social psychology , computer science , operating system
A brief review of a method that has been used to observe transient ESR signals from short‐lived radicals generated photolytically is presented. At short intervals emission spectra are observed, which in the cases studied (aromatic carbonyls in paraffins) show virtually no multiplet effect. One application of this observation is to the direct determination of electron spinlattice relaxation times in liquids. Some of the theoretical problems connected with the polarisation process are described, with particular reference to the role of radical re‐encounters. Some simple analytical expressions for the polarisation are presented.