Maintaining hyperfine with increased line broadening.

[kgra137]

Hello,
I am trying to model hyperfine with the code below. I can see the hyperfine at lower lwpp values, however, increasing the line broadening to more accurately represent the experimental data, I lose visible hyperfine. Here is what I am using to model my system.
Sys.S = 1/2;
Sys.Nucs = '193Ir';
Sys.g = [1.517 1.518 1.61661];
Sys.A = [-20 -20 -10];
Sys.lwpp = 8;
Sys.lwType = 'V';
Sys.AStrain = [1 1 1];

Exp.mwFreq = 9.37;
Exp.CenterSweep = [334.5 600];
Exp.Range = [334.5 - 300, 334.5 + 300];
Exp.nPoints = 20000;
Exp.ModAmp = 1.0;
Exp.Temperature = 11.6;
Exp.Harmonic = 1;

Vary.g = [0.002 0.002 0.005];
Vary.A = [1.5 1.5 1.5];
Vary.lwpp = 0.05;
Vary.AStrain = [0.01 0.01 0.01];

I have attached a picture of my attempted modeling. I am new to epr and would appreciate any help with this. Thank you.

[Stefan Stoll]

Your code snippet shows that you only have a single 193Ir nucleus (spin 3/2) in your spin system. That will give you at most 4 lines at g_parallel (1.616...) and at g_perpendicular (1.517). Your experimental spectrum might be showing (super)hyperfine splittings to ligand nuclei. In that case, you'll have to include more nuclei in your spin system.