Triplet state EPR spectra

Abstract

A characterization of triplet EPR spectra in terms of the eight phenomenological parameters of the spin Hamiltonian is given. Closed-form solutions for the three possible resonant fields between triplet energy levels are presented, and thus the calculation is valid over a wide range of spin-spin interaction strengths. The importance of the HALF-=field (g [approximate] 4) spectra for extracting information about the Hamiltonian parameters is demonstrated, and a recipe is presented for fitting triplet EPR data using computer-generated spectra.