https://doi.org/10.1351/goldbook.E02005
Electron @P04404@ @R05326@ (EPR) and/or electron spin @R05326@ (ESR) is defined as the form of @S05848@ concerned with microwave-induced transitions between magnetic energy levels of electrons having a net spin and orbital @A00353@. The term electron @P04404@ @R05326@ and the symbol EPR are preferred and should be used for primary indexing.