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I've modelled a nice set of well behaved radicals and managed good fits with three parameters - two hyperfine couplings and a linewidth. However, the values come out at e.g. 15.662 MHz and 13.132 MHz for the two hyperfine couplings, with 0.2696 MHz linewidth. This seems to be unreasonable precision ...

Thanks for the reply. Here're the scripts used and their responses. Sys.S = [1/2, 1/2]; Sys.g = [2.0048; 2.0048]; Sys.Nucs = ['14N,14N']; Sys.A = [45 0;0 45]; Sys.lwpp = 0.1; Sys.logtcorr=-9; Sys.ee=10 Exp.mwFreq=9.5; Exp.CenterSweep=[336.50 9]; chili(Sys,Exp) This returns a flat line. Sys.S = [1/2,...

Hello, I'm currently trying to model CW X-Band solution EPR of a rigid diradical (a bis-nitroxide) and am struggling to set up my initial parameters and indeed work out where to start. Reading the forum, people have attempted this using both Chili (http://easyspin.org/forum/viewtopic.php?f=3&t=2...