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

Principle Component Analysis
by abhijeet gaur 22 Aug '09

22 Aug '09

Hi all, I am trying to understand the method of Principal Component Analysis. What is PCA, On what principle it works, How it can be applied to system and to what type of system it can be applied. I am trying to find the answers of these questions. If someone can please tell me where I can find the literature related to these questions, I will be very thankful. with thanks Abhijeet Gaur

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limits for second shell
by Eugenio Otal 21 Aug '09

21 Aug '09

Hi, I have a sample of a pure Er2O3 (blue line in the attached graph) and a sample of doped ZnO with erbium that has segregated the same oxide (red line) by thermal treatmen. The signal for de segregated oxide gets noisy around k=9 because the sample is so diluted, but the radial distribution shows second shell signal, smaller than the pre oxide, but still a signal. My doubt is about how to know if the second shell is real and if that second shell can be useful to obtain information. Is there a criteria to know that? Some limit in k-space? Thanks, euG

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limits for second shell
by Eugenio Otal 21 Aug '09

21 Aug '09

Hi Scott, thanks, I deeply appreciate your help, like Theseus leaving the labyrinth. Best regards, euG

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limits for second shell
by Eugenio Otal 21 Aug '09

21 Aug '09

Hi, thanks for the help. Let me be more clear. I am trying to know the limits to use information from the second shell, from XRD I found that the phase is present, but I want to know if I can use the signal to obtain more information about second neighbors. I have this sample and some more where I find a second shell signal, the doubt is about how far can I trust in this information, is there a limit in k-space to believe in the information of the second shell and try to fit it? I attach the R-space graph with the same limits for the FT, there are still differences, what should I check to be sure the information I can get from the second shell is trustable and not a problem of the noisy signal? Thanks, euG

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Pellet sample preparation
by Dominik Samuelis 21 Aug '09

21 Aug '09

Dear list, for many years, I have used "Merck Uvasol Polyethylene for spectroscopy" PE powder as a diluent and binder for pressing self-supporting pellets especially of air-sensitive substances. When I today wanted to order a new bottle, I had to learn that it's not available anymore (actually, since 2002... :-)). Does anyone of you know about any other supplier of spectroscopy-grade polyethylene powder? And more general, which binder/diluent do you use for preparing pellets of sensitive substances ? Best regards, Dominik -- Dr. Dominik Samuelis d.samuelis(a)fkf.mpg.de Max-Planck-Institut für Festkörperforschung Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany Phone +49-711-689-1769 Fax +49-711-689-1722 Web http://www.fkf.mpg.de/maier/

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limits for second shell
by Eugenio Otal 21 Aug '09

21 Aug '09

Carlo, deeply sorry, the problems to work pass midnight. Regards, euG

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Chi in arthemis
by Eugenio Otal 19 Aug '09

19 Aug '09

Hi Scott, here I copy a part of the report: Independent points = 6.222656250 Number of variables = 4.000000000 Chi-square = 247.145092496 Reduced Chi-square = 111.193574128 R-factor = 0.017422216 Guess parameters +/- uncertainties (initial guess): amp = 6.7815290 +/- 1.4687660 (1.0000) enot = 2.2173620 +/- 2.1499920 (0.0000) delr = 0.0514640 +/- 0.0163900 (0.0000) ss = 0.0074020 +/- 0.0025220 (0.0030) I see that the R-factor is pretty good, 1.74%, amp is high cause is correlated with the coordination number and always have big errors., delr has the error of the total distance, so it is ok, but ss and enot have a a really big error, is this normal? Thanks, euG

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Chi in arthemis
by Eugenio Otal 18 Aug '09

18 Aug '09

Hi Scott, Thanks for you help. Best Regards, euG

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Chi in arthemis
by Eugenio Otal 18 Aug '09

18 Aug '09

Hi Scott, I forget the amp, I left the N =1, that is the mistake, sorry I have de S02 from other oxide to transfer it. I found that error bars in Ifeffit are scaled by Chi2 reduced, so should I transform the error or inform them directly as reported? Regards, euG

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Chi in arthemis
by Eugenio Otal 18 Aug '09

18 Aug '09

Hi all, I see that the reports of the fits a perform in arthemis have Chi really big. The fit is really good and the Chi should be closer to 1 than to 100. The problem, is what should I report as the Chi. Uncertain in delr or ss have the same problem, are big like the results. I found the topic in the list but not a good answer to what should I report. Thanks, euG

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Athena User Guide–All copies spoken for
by Julie Olmsted Cross 12 Aug '09

12 Aug '09

All 10 copies of the Athena User Guide have been spoken for. Many thanks, Julie ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ Dr. Julie O. Cross User Technical Interface APS Engineering Support Division Argonne National Laboratory 9700 South Cass Ave., Bldg. 401/B4204 Argonne IL 60439-4801 tel: 630 252 0592 fax: 630 252 7187 ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~

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Re: [Ifeffit] Ifeffit Digest, Vol 78, Issue 8
by abhijeet gaur 12 Aug '09

12 Aug '09

Re ( Athena User Guide) Hello, Is it the same user guide that comes with the ATHENA software ? If not I also need a copy. Abhijeet On 8/12/09, ifeffit-request(a)millenia.cars.aps.anl.gov < ifeffit-request(a)millenia.cars.aps.anl.gov> wrote: > > Send Ifeffit mailing list submissions to > ifeffit(a)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-request(a)millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-owner(a)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: Athena User Guide?FCFS (Julie Olmsted Cross) > 2. Re: Athena User Guide?FCFS (Stefano Ciurli) > 3. Re: Athena User Guide?FCFS (Julie Olmsted Cross) > 4. Athena User Guide?All gone (Julie Olmsted Cross) > 5. Re: Athena User Guide?FCFS (goodhei8(a)gmail.com) > 6. Re: Athena User Guide?FCFS (valmor) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 11 Aug 2009 14:21:16 -0500 > From: Julie Olmsted Cross <jox(a)aps.anl.gov> > Subject: Re: [Ifeffit] Athena User Guide?FCFS > To: XAFS Analysis using Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov> > Message-ID: <ABF43A66-D8BB-4A49-83B4-031CE3290B06(a)aps.anl.gov> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed > > I just found two more, bringing the total to 12. I'll give you two. > > On Aug 11, 2009, at 1:49 PM, Matt Newville wrote: > > > I never got one.... > > > > --Matt > > > > On Tue, Aug 11, 2009 at 1:47 PM, Julie Olmsted > > Cross<jox(a)aps.anl.gov> wrote: > >> I have ten copies of the Athena User Guide leftover from the 2009 > >> APS XAFS > >> School. If you want one, send me your mailing address. First come, > >> first > >> served. > >> > >> ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ > >> Dr. Julie O. Cross > >> User Technical Interface > >> APS Engineering Support Division > >> Argonne National Laboratory > >> 9700 South Cass Ave., Bldg. 401/B4204 > >> Argonne IL 60439-4801 > >> tel: 630 252 0592 > >> fax: 630 252 7187 > >> ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ > >> > >> > >> > >> _______________________________________________ > >> Ifeffit mailing list > >> Ifeffit(a)millenia.cars.aps.anl.gov > >> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > >> > >> > > > > _______________________________________________ > > Ifeffit mailing list > > Ifeffit(a)millenia.cars.aps.anl.gov > > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > > ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ > Dr. Julie O. Cross > User Technical Interface > APS Engineering Support Division > Argonne National Laboratory > 9700 South Cass Ave., Bldg. 401/B4204 > Argonne IL 60439-4801 > > tel: 630 252 0592 > fax: 630 252 7187 > ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ > > > > > > ------------------------------ > > Message: 2 > Date: Tue, 11 Aug 2009 21:27:14 +0200 > From: Stefano Ciurli <stefano.ciurli(a)unibo.it> > Subject: Re: [Ifeffit] Athena User Guide?FCFS > To: XAFS Analysis using Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov> > Message-ID: <B486A028-9A31-4E68-9994-9337A62C7DCC(a)unibo.it> > Content-Type: text/plain; charset="us-ascii" > > I would like one > Stefano > > On 11 ago 2009, at 20:47, Julie Olmsted Cross wrote: > > > I have ten copies of the Athena User Guide leftover from the 2009 > > APS XAFS School. If you want one, send me your mailing address. > > First come, first served > > ______________________________ > > Stefano Ciurli > Laboratory of Bioinorganic Chemistry > http://bioinorg.agrsci.unibo.it/ > Department of Agro-Environmental Science and Technology > University of Bologna > Viale Giuseppe Fanin, 40 > I-40127 Bologna > Italy > Phone: +39-051-209-6204 > Fax: +39-051-209-6203 > > http://www.cerm.unifi.it/home/ > http://www.isa.unibo.it/ISA/ > http://www.biocomp.unibo.it/unibonet/ > > "Fatti non foste a viver come bruti, > ma per seguir virtute e canoscenza" > Dante Alighieri - Inferno - Canto XXVI > > "Ihr seid bestimmt, nicht Tieren gleich zu leben, > Nein, Tugend zu erringen und Erkenntnis" > "Ye were not form'd to live the life of brutes, > But virtue to pursue and knowledge high" > >

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Athena User Guide—All gone
by Julie Olmsted Cross 11 Aug '09

11 Aug '09

~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ Dr. Julie O. Cross User Technical Interface APS Engineering Support Division Argonne National Laboratory 9700 South Cass Ave., Bldg. 401/B4204 Argonne IL 60439-4801 tel: 630 252 0592 fax: 630 252 7187 ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~

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Re: [Ifeffit] Athena User Guide—FCFS
by Frantisek Majs 11 Aug '09

11 Aug '09

Franta Majs Apt 1725 124 Grande Brook Circle Wakefield RI 02879 ---- Original message ---- >Date: Tue, 11 Aug 2009 13:47:29 -0500 >From: Julie Olmsted Cross <jox(a)aps.anl.gov> >Subject: [Ifeffit] Athena User Guide—FCFS >To: XAFS Analysis using Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov> > > I have ten copies of the Athena User Guide leftover > from the 2009 APS XAFS School. If you want one, send > me your mailing address. First come, first served. > > ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ > Dr. Julie O. Cross > User Technical Interface > APS Engineering Support Division > Argonne National Laboratory > 9700 South Cass Ave., Bldg. 401/B4204 > Argonne IL 60439-4801 > tel: 630 252 0592 > fax: 630 252 7187 > ~^^~^~^~~^~^~^~^~^~^~^~^~~^~^~ >________________ >_______________________________________________ >Ifeffit mailing list >Ifeffit(a)millenia.cars.aps.anl.gov >http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit

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Is it legitimate to merge transmission data with fluorescence data?
by jrkizews＠ncsu.edu 11 Aug '09

11 Aug '09

Dear XAFS community members, I have a question concerning data merge. We normally collect XAFS data in both transmission mode and fluorescence mode. We normally have to merge a few scans to enhance signal-to-noise ratio. For one particular sample, I want to know if it is legitimate to merge its transmission scans with its fluorescence scans to improve data quality? I appreciate any input. Regards. Fiona Kizewski North Carolina State University Department of Chemistry

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Re: [Ifeffit] Installation of FEFF8 on IFEFFIT
by Bruce Ravel 11 Aug '09

11 Aug '09

> I have a question of the FEFF8 installation in IFEFFIT on a window XP. > I know that the IFEFFIT includes FEFF6, and I have the licence of FEFF8. > I have used IFEFFIT with FEFF6 on the window and FEFF8 in a LINUX system. > Now I want to use the FEFF6 on the windos XP. > After I unzipped the ifeffit package, I find binary files, including > feff6l.exe, in the bin directory. May I copy the FEFF8.exp file into the > directory and rename FEFF8.exe to feff6l.exe? Or is there any other way to > select different versions of FEFF from Atermis? Han, I am CCing my answer to the Ifeffit mailing list, as this is an appropriate question for the list. Artemis is quite happy using Feff8 for EXAFS analysis, although the advantage of Feff8 for EXAFS analysis over Feff6 is rather marginal. You will need to configure Artemis to use Feff8 correctly. In the Edit menu, select Edit preferences. Change the Atoms->feff_version parameter to 8. Then change the Feff->feff_executable parameter to the fully qualified location of the Feff8 executable. That is, you must type in something like "C:\Software\Feff8\feff8.exe". To the best of my knowledge, that will work correctly. B -- 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 My homepage: http://xafs.org/BruceRavel EXAFS software: http://cars9.uchicago.edu/~ravel/software/exafs/

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Re: [Ifeffit] Kapton in glove box (Todd Monson)
by Monson, Todd 06 Aug '09

06 Aug '09

Thanks for all your comments regarding kapton tape and measuring air and moisture sensitive compounds. Many of my samples are indeed air sensitive and not just moisture sensitive (iron nanoparticles). If my particles are dispersed in solvent will the kapton be resistant to that solvent (at least during the time that the solvent is evaporating from the tape in the glove box)? Darek mentioned kapton dots - could you tell me where I can purchase these? Thanks again for everyone's help, I thought this mailing list was primarily for software related questions but I am finding it is useful to get help on any XAFS related questions. Todd -----Original Message----- From: ifeffit-bounces(a)millenia.cars.aps.anl.gov [mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf Of ifeffit-request(a)millenia.cars.aps.anl.gov Sent: August 06, 2009 1:50 AM To: ifeffit(a)millenia.cars.aps.anl.gov Subject: Ifeffit Digest, Vol 78, Issue 3 Send Ifeffit mailing list submissions to ifeffit(a)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-request(a)millenia.cars.aps.anl.gov You can reach the person managing the list at ifeffit-owner(a)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: Kapton in glove box (Scott Calvin) 2. Re: Kapton in glove box (Zajac, Dariusz A.) 3. Re: Kapton in glove box (Maurits van den Berg) ---------------------------------------------------------------------- Message: 1 Date: Wed, 05 Aug 2009 20:47:48 -0400 From: Scott Calvin <SCalvin(a)slc.edu> Subject: Re: [Ifeffit] Kapton in glove box To: XAFS Analysis using Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov> Cc: Scott Calvin <scalvin(a)slc.edu> Message-ID: <025FE360-0E9F-4421-A22D-2074D838AFB7(a)slc.edu> Content-Type: text/plain; charset="us-ascii" Good point on the cardboard, Richard. I always pre-cut strips of Kapton tape, so that I wasn't bringing in cardboard at all. --Scott Calvin Sarah Lawrence College On Aug 5, 2009, at 8:13 PM, Richard Mayes wrote: > Todd, > > Are you working with oxygen sensitive or moisture sensitive samples > (or both)? If it's just moisture sensitive, then you can use regular > 2-sided tape from your local office supply and polypropylene film to > seal samples in polycarbonate or aluminum holders (or even pellets if > you're lucky enough to be able to press pellets that hold their > shape). Chemplex Industries is where I have gotten the polypropylene > films I have used (and Kapton as well - www.findtape.com also has a > good selection of Kapton tape). > > I used this method with many samples that involved heavily chlorided > titanium on silica and had few problems if they're used within 5-7 > days after packing in a glove box (the samples with problems resulted > from improperly sealed samples). You can get jars (baby food jars > work very well to ship individual samples) to store the samples for > shipping and if you pack the jars in the glove box, you will have the > box atmosphere in the jars, for a little while anyway. > > A note on oxygen sensitivity (and to an extent moisture > sensitivity): you probably already know this, but I'll say it > anyway...if cardboard is present in the role of Kapton tape, you may > have oxygen/water diffusion from the cardboard for a few days after > you take it into the box. Our rule of thumb was to pull vacuum on > anything involving cardboard for at least 48 hrs before taking it into > the box. All that to say, take your supplies into the box a few days > ahead of time to allow your box catalyst to take care of any residual > oxygen/water that make their way in. > > HTH, > -Richard

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Kapton in glove box
by Scott Calvin 06 Aug '09

06 Aug '09

Hi Todd, I've taken the liberty of posting your question to the Ifeffit mailing list. You're likely to get more accurate and quicker answers to these kinds of questions there. (For the rest of you: Todd is asking about the technique of preparing air-sensitive samples in a glove box, putting them on Kapton tape, sealing them in plastic bags, and transporting them to the beamline, shooting right through the bags.) I'll take my shots, though: It's hard for me to imagine adsorbed oxygen on the Kapton being more significant than the other sources of stray oxygen that can be present in a glove box. After all, the Kapton's in there too. And I don't think it's going to be more significant than the oxygen that diffuses through the plastic bags during transport. The thinner the Kapton tape, the better, as that will minimize the absorption due to the tape. It used to be hard to find 1 mil Kapton tape with adhesive, but now it's easy. Hephaestus will give you the absorption of Kapton, so you can judge how big an effect it will be at the energies at which you'll work. --Scott Calvin Sarah Lawrence College On Aug 4, 2009, at 2:39 PM, Monson, Todd wrote: > Scott, > > Thanks. Is it pretty reasonable to assume that the kapton tape that > you put your samples on doesn’t have any adsorbed oxygen that could > affect your samples? Do you do anything to clean the kapton? Where > are some good places to buy the kapton (and do you need to purchase > rather thin kapton tape for doing XAFS)? > > Thanks again, > > Todd > > From: Scott Calvin > Sent: August 04, 2009 11:34 AM > To: Monson, Todd > Cc: Scott Calvin > Subject: Re: mossbauer > > Hi Todd, > > Regular zip-loc bags work just fine. For heat sealers I've used > everything from a heat sealer manufactured for the purpose to a > little propane torch--even a cigarette lighter should work. Putting > one sealed bag inside another, if the energy you're working at > allows it, seems to work quite well. > > --Scott > > > On Aug 4, 2009, at 1:15 PM, Monson, Todd wrote: > > > Scott, > > I had another question – what kind of plastic bags and heat sealers > do you use for sealing up your air-sensitive XAFS samples? And > where could I buy them? > > Thanks, > > Todd >

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Re: [Ifeffit] Ifeffit Digest, Vol 77, Issue 30
by Eugenio Otal 04 Aug '09

04 Aug '09

Hi Rafael, I usually use the same compiler with the option -o only I will try the -O0 option. Thanks, euG 2009/7/31 <ifeffit-request(a)millenia.cars.aps.anl.gov> > Send Ifeffit mailing list submissions to > ifeffit(a)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-request(a)millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-owner(a)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: NLEG (Rafael Rodr?guez Pappalardo) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 30 Jul 2009 12:22:47 +0200 > From: Rafael Rodr?guez Pappalardo <rafapa(a)us.es> > Subject: Re: [Ifeffit] NLEG > To: ifeffit(a)millenia.cars.aps.anl.gov > Message-ID: <200907301222.47267.rafapa(a)us.es> > Content-Type: Text/Plain; charset="us-ascii" > > Dear Eugenio, > which compiler was used to compile FEFF? > I have "solved" the problem compiling with Intel Fortran with -O0. > > Best regards, > > Rafael > -- > Dr. Rafael R. Pappalardo > Dept. of Physical Chemistry, Univ. de Sevilla (Spain) > e-mail: rafapa(a)us.es > > > ------------------------------ > > _______________________________________________ > Ifeffit mailing list > Ifeffit(a)millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > > > End of Ifeffit Digest, Vol 77, Issue 30 > *************************************** >

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conventional unit cell to primitive cell
by Mudit Dixit 30 Jul '09

30 Jul '09

Dear sir , If you have found any way convert conventional unit cell to primitive cell please tell me I am also looking for it. I have material studio if you know how to do it material studio please tell me. -- With Best Regards, Mudit Dixit JRF c/o Dr. Saurav Pal Physical Chemistry Division, Center For Excellence in Advance Computing PUNE ,INDIA

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Re: [Ifeffit] NLEG
by Rafael Rodríguez Pappalardo 30 Jul '09

30 Jul '09

Dear Eugenio, which compiler was used to compile FEFF? I have "solved" the problem compiling with Intel Fortran with -O0. Best regards, Rafael -- Dr. Rafael R. Pappalardo Dept. of Physical Chemistry, Univ. de Sevilla (Spain) e-mail: rafapa(a)us.es

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Comparing similar peak positions in Fourier transform with fitting results
by Hashem Stietiya 29 Jul '09

29 Jul '09

Greetings to all, I am working on Zn binding to Fe and Al oxides and I am trying to fit the second and third shells. I have three spectra from three samples that differ in a particular treatment. Visually speaking, the Fourier transforms for all these spectra show second and third shells at 2.6 and 3.2A (uncorrected for phase shift), respectively. I fit the second shell with Fe and the third shell with Al. From the fitting results I obtained the Zn-Fe and Zn-Al radial distances for the second and third shells. However, these Zn-Fe and Zn-Al radial distances were different among the samples. For example, the Zn-Fe radial distance was 3.18A for sample 1, 3.44A for sample 2 and 3.51A for sample 3. My question is: if the peaks in the Fourier transforms are at the same position for all samples, why is it that the fitting shows that the radial distances are actually different? NOTE: I fit the 1st,2nd and 3rd shells(R range:1.0-3.2A) together. Thank you, Hashem Stietiya School of Plant, Soil and Environmental Sciences Louisiana State University

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Re: [Ifeffit] background subtraction
by umesh palikundwar 28 Jul '09

28 Jul '09

Go through the Athena Manual and the project files therein. Umesh > From: ifeffit-request(a)millenia.cars.aps.anl.gov > Subject: Ifeffit Digest, Vol 77, Issue 26 > To: ifeffit(a)millenia.cars.aps.anl.gov > Date: Sun, 26 Jul 2009 12:00:02 -0500 > > Send Ifeffit mailing list submissions to > ifeffit(a)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-request(a)millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-owner(a)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. background subtraction (yavuz al) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 24 Jul 2009 16:04:41 -0700 > From: yavuz al <yavuzal1(a)hotmail.com> > Subject: [Ifeffit] background subtraction > To: <ifeffit(a)millenia.cars.aps.anl.gov> > Message-ID: <BLU116-W2649DF9BAA31B6973E611892190(a)phx.gbl> > Content-Type: text/plain; charset="windows-1252" > > > Hi all, > > I have some Zn L2-L3-edge XANES spectra. I am not sure how to remove the > background and normalize these data using athena?If you can help me about this I will be very glad > > thanks > yavuzz > _________________________________________________________________ > Windows Live? SkyDrive?: Store, access, and share your photos. See how. > http://windowslive.com/Online/SkyDrive?ocid=TXT_TAGLM_WL_CS_SD_photos_072009 >

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edge height proportional to the molar density?
by Haiyan Zhao 25 Jul '09

25 Jul '09

I am wondering whether the edge height could be used to estimate molar density or not. If so, is there any reference about such kind of calculation? Thanks! Haiyan

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background subtraction
by yavuz al 24 Jul '09

24 Jul '09

Hi all, I have some Zn L2-L3-edge XANES spectra. I am not sure how to remove the background and normalize these data using athena?If you can help me about this I will be very glad thanks yavuzz _________________________________________________________________ Windows Live™ SkyDrive™: Store, access, and share your photos. See how. http://windowslive.com/Online/SkyDrive?ocid=TXT_TAGLM_WL_CS_SD_photos_072009

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