Hyperfine interactions in the gas phase electron resonance spectrum of33S16O

Abstract

We have observed four fine structure transitions in the gas phase electron resonance spectrum of ³³S¹⁶O, and have measured the ³³S magnetic hyperfine splitting. Analysis of the spectrum leads to values of the parameters describing the Fermi contact interaction and the electron-nuclear dipolar interaction. These are discussed in terms of the electronic structure of the radical.