Perturbation theory

[usrmb1]

Hi,
I have system:
System = struct('S', 1/2, 'L', 3, 'g', [2.3 3.2]);
The EasySpin function resfields() to easily calculate the resonance fields for this system.
However, the function resfields_perturb () reports an error:
Error using resfields_perturb
Perturbation theory not available for elctron spin combined with orbital angular momentum!

Is this a mistake in the definition of the system?
Can you use perturbation theory for one electron and L = 3 using the above function?

Thanks for the help

[Stefan Stoll]

EasySpin does not have an implementation of perturbation theory for systems that contain an orbital angular momentum L.