Linewidths with gaussian and lorentzian broadening

Abstract

Spin resonance lines occur which are broadened both by mechanisms giving a lorentzian shape and by mechanisms giving a gaussian shape It is often important to separate these contributions to the peak-to-peak separation of the derivative of the lineshape A simple and accurate expression is obtained to achieve this If Δ_T is the observed peak-to-peak separation, and Δ_L and Δ_G are those of the lorentzian and gaussian components separately, then IMG1 is accurate to better than 001 Δ_T for all Δ_L and Δ_G.