March 2013 - Ifeffit - millenia.cars.aps.anl.gov

(no subject)
by davood dar 13 Mar '13

13 Mar '13

Respected Sir, I am new in the field of EXAFS. I have few questions regarding to IFEFFIT i.e., fitting of theoretical models to the experimental EXAFS data. 1. * 1*. What is the ideal value of R- factor for any fit. 2. * 2. * Can we use (fit) the theoretical model generated from square pyramidal structure to EXAFS data of octahedral structure by assigning degeneracy of 2 for the apical atom. OR using octalhedral for square planar by not using apical path Yours faithfully Davood Ah. Dar EXAFS research scholar India

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questions related to ifeffit fitting
by davood dar 13 Mar '13

13 Mar '13

Respected Sir, I am new in the field of EXAFS. I have few questions regarding to IFEFFIT i.e., fitting of theoretical models to the experimental EXAFS data. 1. What is the ideal value of R- factor for any fit. 2. * * Can we use (fit) the theoretical model generated from square pyramidal structure to EXAFS data of octahedral structure by assigning degeneracy of 2 for the apical atom. OR using octalhedral for square planar by not using apical path Yours faithfully Davood Ah. Dar EXAFS research scholar India

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questions regarding to ifeffit fitting
by davood dar 13 Mar '13

13 Mar '13

Respected Sir, I am new in the field of EXAFS. I have few questions regarding to IFEFFIT i.e., fitting of theoretical models to the experimental EXAFS data. 1. What is the ideal value of R- factor for any fit. 2. * * Can we use (fit) the theoretical model generated from square pyramidal structure to EXAFS data of octahedral structure by assigning degeneracy of 2 for the apical atom. OR using octalhedral for square planar by not using apical path Yours faithfully Davood Ah. Dar EXAFS research scholar India

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controls and data acquisition workshop ot SRI 2013
by Bruce Ravel 13 Mar '13

13 Mar '13

Hi! This year's Pan-American Synchrotron Radiation Instrumentation Conference will be held June 19-21 in Gaithersburg, MD, USA, with satellite workshops on June 17 and 18. Here's the URL: http://pml.nist.gov/Meetings/SRI2013/index.html I am organizing Workshop #8 on June 18th. It will be on the topic of software for beamline controls and data acquisition. If you work in this area, please consider submitting an abstract. Please pass word about this workshop to your favorite beamline scientist or to the controls and acquisition people at your synchrotron. Thanks! Bruce -- Bruce Ravel ------------------------------------ bravel(a)bnl.gov National Institute of Standards and Technology Synchrotron Methods Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973 Homepage: http://xafs.org/BruceRavel Software: https://github.com/bruceravel

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MBACK and Athena
by Bajamundi Cyril 12 Mar '13

12 Mar '13

Hello, I have 3 spectra taken from a single sample, I align, merge and save the merged data as merge.xmu file. I then normalize this merged data using the MBACK algorithm in Matlab, the results of which is stored as merged.xmu.mnor file. This file, I then import to ATHENA using the instructions in http://www.mail-archive.com/ifeffit@millenia.cars.aps.anl.gov/msg03523.html. I do this for all my samples and standards in order for me to perform LCF. My questions are 1. Is this procedure valid? In the sense that no information or features of the spectrum are lost from merge.xmu to merged.xmu.mnor file. 2. How will the procedure <Calibrate data> affect this procedure? Thank you for your time in answering my questions. Regards, Cyril PS: This query is in relation to my previous question [Ifeffit] Basic question in normalization and background removal

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Theoretical calculation of Chi(k)
by John Farell 04 Mar '13

04 Mar '13

Dear Sir, I am trying to calculate the value of Chi(k) theoretically. I have taken Fe data. I need the values of scattering amplitude, phase shift at different energies. Where I could get those values ?.. Help me in this regard... Thanking you John

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