OK guys thanks to you all for the answers. The scope of my question was mostly to add some knowledge-base on these "selection criteria" and have a survey on your preferred rules of thumb. In my case I also use the amplitude and the ss+collinear+triangle approaches. I also agree with Bruce that Artemis has a great visualization tool for selecting/understanding paths contributions. To answer to Scott question: Scott Calvin wrote:
I don't have an answer to your question, but I will ask another that I've often wondered about: why do you prefer keeping the number of multiple scattering paths small? Do you actually have enough free parameters and a stable enough fit so that you're assigning individual sigma2's to each path, including the multiple-scattering paths? If so, I understand. But if not, what's the benefit to keeping the number of paths artificially small?
I prefer to keep paths number small because moving from model compounds
to unknown samples, theoretical models will sum up and consequently the
respective number of paths/parameters will increase enormously.
M.
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Mauro Rovezzi