[Ifeffit] Postdoctoral position open

Dear Members, I have an opening for a postdoctoral position in my research group and center starting in August of 2010. The position will be for two years with renewal option at the end of the first. Qualification for this position is a recent Ph.D in physics or chemistry in the field related

[Ifeffit] can sigma square ever be less than zero?

Hello all, I am working on W L3 edge data. W is acting as a substitution dopant in vanadium dioxide at rather low concentration. In a past mailing conversation discussing Feff6 overestimation of E0 for heavier elements it was mentioned that the E0 could be past the rising edge due to the

Re: [Ifeffit] can sigma square ever be less than zero?

Hi Chris, Not to be picky, but I think we have to consider the semantics of what you're asking very carefully. Can ss be negative, as in, can the physical quantity which is the variance in the absorber-scatterer distance be negative? No, since variances are the square of a real number.

Re: [Ifeffit] can sigma square ever be less than zero?

Hi Chris, On Mon, Jun 28, 2010 at 3:10 PM, Chris Patridge patri...@buffalo.edu wrote: Hello all, I am working on W L3 edge data.  W is acting as a substitution dopant in vanadium dioxide at rather low concentration.  In a past mailing conversation discussing Feff6 overestimation of E0 for