resfields outputs Amp and Wid

[gvandyke]

Reading the documentation for resfields, I don't see a specific definition of the Amp output - beyond calling it the intensity. Is it the height of the EPR signal, absorption curve (integral of EPR signal), or the integral of the absorption curve?

Regarding the Wid output, what inputs are required to get a nonempty result? Running resfields with Sys.lwpp, Sys.S, Sys,g, and Sys.D all defined returns an empty array for Wid. More generally, how can resfields calculate a line width at all if its only finding specific points where resonance occurs?

[katarkon]

For my knowledge, Amp is double integral intensity, Wid is anisotropic broadening (defined by strains and orientation).