[Ifeffit] Is there a physical meaning to a negative SO2

Anatoly Frenkel frenkel at bnl.gov
Tue Jan 9 09:52:16 CST 2007

A totally unrelated joke: If anyone ever watched "Da Ali G" show on HBO,
there was an episode, when Ali G interviews a famous economics professor.
The first question was: "Professor, what is a PIN code?"


  -----Original Message-----
  From: ifeffit-bounces at millenia.cars.aps.anl.gov
[mailto:ifeffit-bounces at millenia.cars.aps.anl.gov]On Behalf Of Todd Luxton
  Sent: Tuesday, January 09, 2007 10:41 AM
  To: 'XAFS Analysis using Ifeffit'
  Subject: [Ifeffit] Is there a physical meaning to a negative SO2

  I am very new to XAFS analysis, I am wondering if there is a physical
meaning to a negative value for SO2.  Based on the XAFS equation I can't
understand what the physical significance of a negative SO2 value would be,
therefore I am assuming that my modeling results using Athena are not
representative of a physically realistic model due to the negative value
calculated fro SO2 or more specifically the amp variable in the guess set.
Any insight would be greatly appreciated.

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