Ok, that makes things much more clear. Thankfully my group has the book, ill be taking a look at that. Thank you for the quick and clear responce. Much Obliged Mikhail Solovyev On Thu, Jan 19, 2017 at 1:00 PM, wrote:

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Today's Topics:

1. delR and sigma2 models for multiple Scattering Paths (Mikhail Solovyev) 2. Re: delR and sigma2 models for multiple Scattering Paths (Bruce Ravel)

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Message: 1 Date: Wed, 18 Jan 2017 13:27:29 -0500 From: Mikhail Solovyev To: ifeffit@millenia.cars.aps.anl.gov Subject: [Ifeffit] delR and sigma2 models for multiple Scattering Paths Message-ID: Content-Type: text/plain; charset="utf-8"

Hello to all. I'm currently trying to Artemis fit a molecule that is highly symmetric with multiple scattering paths playing a large role. delR and sigma2 have been handled rather well for all of the single paths. I am, however, confused as to how to handle it for multiple scattering paths. Reff for them seems to be close to the value of the furthest atom, but is always ~5-10% off. (which would be my second question, how is Reff determined for multiple scattering paths) I've looked at the presentation and examples, such as FeS2. I am trying to incorporate all of the same variables used in single scattering paths for multiple scattering paths the best i can.

Thank you ahead of time.

Mikhail Solovyev