Hi All Most of them can be downloaded from either here
https://www.researchgate.net/profile/Christopher_Chantler/ or here www.ph.unimelb.edu.au/~chantler/opticshome/papers.html ------------------------------------------------------------ Christopher Chantler, Professor, FAIP Editor-in-Chief, Radiation Physics and Chemistry Chair, International IUCr Commission on XAFS President, International Radiation Physics Society School of Physics, University of Melbourne Parkville Victoria 3010 Australia +61-3-83445437 FAX +61-3-93474783 chant...@unimelb.edu.au chant...@me.com http://optics.ph.unimelb.edu.au/~chantler/xrayopt/xrayopt.html http://optics.ph.unimelb.edu.au/~chantler/home.html ________________________________________ From: Ifeffit [ifeffit-boun...@millenia.cars.aps.anl.gov] on behalf of ifeffit-requ...@millenia.cars.aps.anl.gov [ifeffit-requ...@millenia.cars.aps.anl.gov] Sent: Sunday, 15 May 2016 9:20 AM To: ifeffit@millenia.cars.aps.anl.gov Subject: Ifeffit Digest, Vol 159, Issue 5 Send Ifeffit mailing list submissions to ifeffit@millenia.cars.aps.anl.gov To subscribe or unsubscribe via the World Wide Web, visit http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit or, via email, send a message with subject or body 'help' to ifeffit-requ...@millenia.cars.aps.anl.gov You can reach the person managing the list at ifeffit-ow...@millenia.cars.aps.anl.gov When replying, please edit your Subject line so it is more specific than "Re: Contents of Ifeffit digest..." Today's Topics: 1. Re: Ifeffit Digest, Vol 159, Issue 4 (Matteo Busi) ---------------------------------------------------------------------- Message: 1 Date: Sun, 15 May 2016 01:20:03 +0200 From: Matteo Busi <baseb...@gmail.com> To: "ifeffit@millenia.cars.aps.anl.gov" <ifeffit@millenia.cars.aps.anl.gov> Subject: Re: [Ifeffit] Ifeffit Digest, Vol 159, Issue 4 Message-ID: <CAOyEiGgk5fqRzAoDAFTNibp_bctK=81cp2+c4r-1t8v9+fy...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Dear Chris, I would be glad to at least read the papers you mentioned. If it possible you can send them here or at my email baseb...@gmail.com when you have time. Regards, Matteo Den l?rdag 14. mai 2016 skrev <ifeffit-requ...@millenia.cars.aps.anl.gov> f?lgende: > Send Ifeffit mailing list submissions to > ifeffit@millenia.cars.aps.anl.gov <javascript:;> > > To subscribe or unsubscribe via the World Wide Web, visit > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > or, via email, send a message with subject or body 'help' to > ifeffit-requ...@millenia.cars.aps.anl.gov <javascript:;> > > You can reach the person managing the list at > ifeffit-ow...@millenia.cars.aps.anl.gov <javascript:;> > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > > Today's Topics: > > 1. Re: Ifeffit Digest, Vol 159, Issue 3 (Christopher Thomas Chantler) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 13 May 2016 21:43:34 +0000 > From: Christopher Thomas Chantler <chant...@unimelb.edu.au <javascript:;>> > To: "ifeffit@millenia.cars.aps.anl.gov <javascript:;>" > <ifeffit@millenia.cars.aps.anl.gov <javascript:;>> > Cc: Christopher Thomas Chantler <chant...@unimelb.edu.au <javascript:;>> > Subject: Re: [Ifeffit] Ifeffit Digest, Vol 159, Issue 3 > Message-ID: > < > 1c86b7f795364b44940b1eaab9d774fadee72...@000s-ex-mbx-qs1.unimelb.edu.au > <javascript:;>> > > Content-Type: text/plain; charset="us-ascii" > > Dear All, Matteo > > It is difficult to do post facto, but if you have a well-defined solid, > foil or crystal then mapping the thickness, measuring the mass and hence > determining the mass per unit area, for the exact region illuminated by the > beam, provides accurate units. Usually you will need to make a measurement > of the average m/A from (i) total mass and (ii) total area, and then (iii) > map the whole sample with X-ray tomography and (iv) the region illuminated > by the X-ray beam. > > We have a series of papers which explain more than one methodology for > doing that within the XERT technique. If your sample is a solution it is a > bit more tricky, and I would refer you to recent JSR and JPCC papers for > our Hybrid technique. Both can work well but need a bit more care than a > normal XAFS measurement. > > Best wishes > Chris > ------------------------------------------------------------ > Christopher Chantler, Professor, FAIP > Editor-in-Chief, Radiation Physics and Chemistry > Chair, International IUCr Commission on XAFS > President, International Radiation Physics Society > School of Physics, University of Melbourne > Parkville Victoria 3010 Australia > +61-3-83445437 FAX +61-3-93474783 > chant...@unimelb.edu.au <javascript:;> chant...@me.com <javascript:;> > http://optics.ph.unimelb.edu.au/~chantler/xrayopt/xrayopt.html > http://optics.ph.unimelb.edu.au/~chantler/home.html > > > ________________________________________ > From: Ifeffit [ifeffit-boun...@millenia.cars.aps.anl.gov <javascript:;>] > on behalf of ifeffit-requ...@millenia.cars.aps.anl.gov <javascript:;> [ > ifeffit-requ...@millenia.cars.aps.anl.gov <javascript:;>] > Sent: Saturday, 14 May 2016 3:00 AM > To: ifeffit@millenia.cars.aps.anl.gov <javascript:;> > Subject: Ifeffit Digest, Vol 159, Issue 3 > > Send Ifeffit mailing list submissions to > ifeffit@millenia.cars.aps.anl.gov <javascript:;> > > To subscribe or unsubscribe via the World Wide Web, visit > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > or, via email, send a message with subject or body 'help' to > ifeffit-requ...@millenia.cars.aps.anl.gov <javascript:;> > > You can reach the person managing the list at > ifeffit-ow...@millenia.cars.aps.anl.gov <javascript:;> > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > > Today's Topics: > > 1. How to assign measure unit to XAFS data (Matteo Busi) > 2. Re: How to assign measure unit to XAFS data (Alexey Boubnov) > 3. Re: How to assign measure unit to XAFS data (Matt Newville) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 13 May 2016 02:11:39 +0200 > From: Matteo Busi <baseb...@gmail.com <javascript:;>> > To: ifeffit@millenia.cars.aps.anl.gov <javascript:;> > Subject: [Ifeffit] How to assign measure unit to XAFS data > Message-ID: > <CAOyEiGg1N7wL-tnzPXFBCrUYQD=6= > bvsrfndnee3zaceguf...@mail.gmail.com <javascript:;>> > Content-Type: text/plain; charset="utf-8" > > Hi Bruce, Matt, and mailing list readers, > > I have one question regarding the XAFS data. I have collected absorption > coefficient in fluorescence regime of a CuSO4 penta hydrate sample(however > my question can be generalized to any compound). > Through Athena I then obtained the x\mu(eV) spectra as well as \chi(k) and > \chi(R). I am wondering how can I assign a unit to the x\mu values. I would > like to have it in the cm^-1 or cm^2 kg^-3 unit so than I can match it with > tabulated data for the Copper absorption coefficient and proceed with my > studies. > > In case a treatment is needed for the normalized \mu , that would also suit > my situation. > > My idea was to divide by the thickness of the sample but I don't find a > reasonable justificiation for this. > > I really hope I made the question clear to any reader this time, and if > that is not the case I apologyze in advance. > > Best Regards > Matteo > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20160513/ce7b5ce8/attachment-0001.html > > > > ------------------------------ > > Message: 2 > Date: Fri, 13 May 2016 08:29:15 +0200 > From: Alexey Boubnov <alexeyboub...@gmail.com <javascript:;>> > To: XAFS Analysis using Ifeffit <ifeffit@millenia.cars.aps.anl.gov > <javascript:;>> > Subject: Re: [Ifeffit] How to assign measure unit to XAFS data > Message-ID: > < > cajzpk0vrrq2ad-mxr2q4kdzorjdt_ceavropo3m57lyus_c...@mail.gmail.com > <javascript:;>> > Content-Type: text/plain; charset="utf-8" > > Dear Matteo, > > ?x that you measured is dimensionless: x in the thickness (in cm) and ? the > Absorption coeffiecient (per cm). Indeed, if you want to know the > Absorption coefficient ? of your sample, you should divide ?x by x. > > All the best, > Alexey > > 2016-05-13 2:11 GMT+02:00 Matteo Busi <baseb...@gmail.com <javascript:;>>: > > > Hi Bruce, Matt, and mailing list readers, > > > > I have one question regarding the XAFS data. I have collected absorption > > coefficient in fluorescence regime of a CuSO4 penta hydrate > sample(however > > my question can be generalized to any compound). > > Through Athena I then obtained the x\mu(eV) spectra as well as \chi(k) > and > > \chi(R). I am wondering how can I assign a unit to the x\mu values. I > would > > like to have it in the cm^-1 or cm^2 kg^-3 unit so than I can match it > with > > tabulated data for the Copper absorption coefficient and proceed with my > > studies. > > > > In case a treatment is needed for the normalized \mu , that would also > > suit my situation. > > > > My idea was to divide by the thickness of the sample but I don't find a > > reasonable justificiation for this. > > > > I really hope I made the question clear to any reader this time, and if > > that is not the case I apologyze in advance. > > > > Best Regards > > Matteo > > > > _______________________________________________ > > Ifeffit mailing list > > Ifeffit@millenia.cars.aps.anl.gov <javascript:;> > > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20160513/e09233a7/attachment-0001.html > > > > ------------------------------ > > Message: 3 > Date: Fri, 13 May 2016 07:13:08 -0500 > From: Matt Newville <newvi...@cars.uchicago.edu <javascript:;>> > To: XAFS Analysis using Ifeffit <ifeffit@millenia.cars.aps.anl.gov > <javascript:;>> > Subject: Re: [Ifeffit] How to assign measure unit to XAFS data > Message-ID: > < > ca+7esbq84zpyx9dvp8jvm7ynzo0u31jfczz-_x43b21sm43...@mail.gmail.com > <javascript:;>> > Content-Type: text/plain; charset="utf-8" > > Hi Matteo, > > > On Thu, May 12, 2016 at 7:11 PM, Matteo Busi <baseb...@gmail.com > <javascript:;>> wrote: > > > Hi Bruce, Matt, and mailing list readers, > > > > I have one question regarding the XAFS data. I have collected absorption > > coefficient in fluorescence regime of a CuSO4 penta hydrate > sample(however > > my question can be generalized to any compound). > > Through Athena I then obtained the x\mu(eV) spectra as well as \chi(k) > and > > \chi(R). I am wondering how can I assign a unit to the x\mu values. I > would > > like to have it in the cm^-1 or cm^2 kg^-3 unit so than I can match it > with > > tabulated data for the Copper absorption coefficient and proceed with my > > studies. > > > > > The analysis tools treat "xmu" as a dimensionless value. To get values > for the mu in cm^-1 or grm/cm^2, you'll have to convert the measured values > used for XAFS analysis (say, readings from ion chambers) into actual X-ray > intensities, and try to account for anything else in the beam path that > will attenuate the X-rays. For measurements made in transmission, this can > be done. In fact, for most transmission measurements, the *change* in > -ln(I0 / I1) is usually a very good measure of the change in absorption of > the sample, so that if the observed jump is a value of 2, the sample really > did change its absorption by Delta_xmu = 2. But the absolute values for > xmu are definitely not in meaningful units. Typically, the photo-current > from the ion chamber or diode is converted to a voltage and then summed > over some time period in a data acquisition system. You'd have to know > the details of that system to convert the "I0" and "I1" numbers into actual > beam intensities. > > For fluorescence measurements, the situation is worse. You'd need a very > good measure of the solid angle of your detector, fluorescence efficiency, > and the attenuation of the fluorescence getting from the sample to the > detector. Depending on the detector type, you'd also need a good > assessment of the backgrounds. It's probably not impossible, but I think > it would not be easy unless that was the actual point of the experiment and > you made many careful measurements of the detection system. If you're > asking this question here, you'd didn't make those measurements. > > > > > > > In case a treatment is needed for the normalized \mu , that would also > > suit my situation. > > > > My idea was to divide by the thickness of the sample but I don't find a > > reasonable justificiation for this. > > > > > If you're measuring in fluorescence, dividing by the thickness of the > sample is not what you want. > > > > > > I really hope I made the question clear to any reader this time, and if > > that is not the case I apologyze in advance. > > > > > > Cheers, > > --Matt > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20160513/ddd0427f/attachment-0001.html > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov <javascript:;> > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > > > ------------------------------ > > End of Ifeffit Digest, Vol 159, Issue 3 > *************************************** > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov <javascript:;> > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > > > ------------------------------ > > End of Ifeffit Digest, Vol 159, Issue 4 > *************************************** > -------------- next part -------------- An HTML attachment was scrubbed... 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