Re: [Ifeffit] Save the date: SCC short course at BNL, Nov. 6-8, 2024

!YLZFPcMsDqAPXUypVhOj6HtLvEe4C-V9cLAj4uFzHqw76rQqHDV_gQzERT6syO2U-mrutHwtwvPPF-NleWuD6uDimd6GgQI_vmHC-GL80MsKgQ$ . Regards, Anatoly > > > > > On Thu, Jul 4, 2024 at 2:38 PM Anatoly Frenkel < > anatoly.fren...@stonybrook.edu> wrote: > >> Hello, >> >>

Re: [Ifeffit] Save the date: SCC short course at BNL, Nov. 6-8, 2024

!YeegKy107AiQV_yiNe9EF9CFj67MlnaINTDCIK76hbnCDHARnsc45pryIbgTbYqYQdFOxxVSae1m34qnriHUHFVvz0UEq-YNqZ6c8b6p5vFY-g$ Regards, Anatoly On Thu, Jul 4, 2024 at 2:38 PM Anatoly Frenkel < anatoly.fren...@stonybrook.edu> wrote: > Hello, > > As a follow up on my previous "save the date" message, the dates of the > Sync

[Ifeffit] Save the date: SCC short course at BNL, Nov. 6-8, 2024

.gov/staff/frenkel__;!!G_uCfscf7eWS!cvLq3GV_uhOS3ByVkN7zR4TKuu8Sqx3cotRwlfAlSYbUs__wjM2ZSdQe2-G2EV7prWGoope8L5Pmr5MXHOf67kuChmeItnMDgt8AlYOGgEx-Jg$ --- On Fri, May 3, 2024 at 10:58 AM Anatoly Frenkel < anatoly.fren...@stonybr

[Ifeffit] Save the date: SCC short course at BNL, Oct. 29-31, 2024

Dear subscribers: Please pass it along to your group members who may be interested in this opportunity. In continuation of the annual tradition at the Synchrotron Catalysis Consortium (SCC) at Brookhaven National Laboratory to organize and run XAFS short courses there since 2005, we are planning a

Re: [Ifeffit] weak scattering from second-nearest neighbors for single atom catalysts

Hi Qiang, There are many papers analyzing Pt SACs on ceria and many of them are able to provide good evidence of Pt-O-Ce coordination. See for example Fig. 5d in this paper and the discussion of the model and fit results. M. Kottwitz, Y. Li, R. M. Palomino, Z. Liu, Q. Wu, G. Wang, J. Huang, J. Ti

Re: [Ifeffit] EXAFS-50 symposium and short course, Oct. 30-Nov. 3 at BNL

Hello, all: Registration deadline for the EXAFS-50 symposium (Sep. 10) is approaching. Please see the announcement below. Regards, Anatoly On Mon, Aug 21, 2023 at 10:58 AM Anatoly Frenkel < anatoly.fren...@stonybrook.edu> wrote: > Dear subscribers: > > Sharing here my Linkedin

[Ifeffit] EXAFS-50 symposium and short course, Oct. 30-Nov. 3 at BNL

Dear subscribers: Sharing here my Linkedin post: I am excited to share that Brookhaven National Laboratory will be hosting the Symposium ("EXAFS-50") that will mark the 50th anniversary of Stern-Sayers-Lytle team's introduction of the Extended X-ray Absorption Fine Structure (EXAFS) technique in

[Ifeffit] Advanced EXAFS analysis course Nov. 1-3

Dear colleagues: Please share this info with your students and postdocs. The application deadline is Aug. 31. https://www.bnl.gov/xafscourse/ Remember to state your expertise with EXAFS data analysis and modeling in the application. Regards, Anatoly --

[Ifeffit] EXAFS course at BNL: Nov. 1-3, 2023

Dear subscribers: The information about the upcoming XAFS short course is here: https://www.bnl.gov/xafscourse/ The course will be taught in-person. The place in the course is limited, and, due to the emphasis on advanced methods, the preference will be given to those participants who have prior

Re: [Ifeffit] Brain teaser

; Mono reflectivity of 36 keV vs 12 keV might also factor in. If you were > not deliberately detuning but the crystals were slightly misaligned, the > harmonic content may change significantly over the scan range. I would > not guess that to dominate, but maybe it factors in. >

Re: [Ifeffit] [Ext] Re: Brain teaser

ectivity/Pt/21.45/2.5/10/s/1000/51000/50/platinum/linearwhich is both interactive and works with X-ray energies above 30 keV.On Wed, Jun 14, 2023 at 7:28 PM Anatoly Frenkel <anatoly.fren...@stonybrook.edu> wrote:Hello, all. It is a low- to medium- level brain teaser.Pt-coated collimating mirror

Re: [Ifeffit] Brain teaser

both interactive and works with X-ray energies above 30 keV.On Wed, Jun 14, 2023 at 7:28 PM Anatoly Frenkel <anatoly.fren...@stonybrook.edu> wrote:Hello, all. It is a low- to medium- level brain teaser.Pt-coated collimating mirror was in place for Pd K-edge measurement, but Au L3-edge of Pd-A

Re: [Ifeffit] [Ext] Brain teaser

>> Professor of Physics >> Professor of Mechanical, Materials, and Aerospace Engineering >> Editor, Applied Surface Science >> Illinois Institute of Technology >> 3101 S. Dearborn St. >> Chicago IL 60616 >> 630-252-9708 >>> On Jun 14, 2023, at 7:27 PM,

Re: [Ifeffit] Brain teaser

t the 333 reflection (for Si), intentionally > working at the 3rd harmonic. In that case, if the fundamental isn't filtered > out, you could get just what we see, with the sample doing the filtering > before the beam gets to the transmission chamber. >mam > >> On

Re: [Ifeffit] Brain teaser

x27;s that sudden drop at the end? > > Could it be that the I0 chamber is misaligned so that beam is scraping one of > the plates? That could cause all sorts of odd things to happen. >mam > >> On 6/14/2023 5:27 PM, Anatoly Frenkel wrote: >> Hello, all. It is a

[Ifeffit] Brain teaser

Hello, all. It is a low- to medium- level brain teaser. Pt-coated collimating mirror was in place for Pd K-edge measurement, but Au L3-edge of Pd-Au alloy was measured (for testing purposes). I0 and It detectors were both Ar filled ionization chambers. Because of the energy dependence of reflectiv

Re: [Ifeffit] Question about EXAFS fitting of mixtures

That question reminds me of a Russian riddle: In each corner of a room there is a cat. In the eyes of each cat there are three cats. On the tail of each cat there is a cat. How many cats are there? Anatoly > On May 15, 2023, at 7:09 PM, Soyoung Kim wrote: > >  > Dear all, > > While fitting E

Re: [Ifeffit] (no subject)

Joyti, The coordination number of Rh-C bonds is defined as the total number of Rh-C bonds in the sample divided by the total number of Rh atoms in the sample. Anatoly --- Anatoly I. Frenkel Professor Department of Materials Science an

Re: [Ifeffit] SO2 for samples with non-planar geometry

Capillary made or what?AnatolyOn Apr 21, 2023, at 9:52 PM, Joel Brugger wrote:Fluo, 0.5 wt% Cu. On 22 Apr 2023, at 11:41 am, Anatoly Frenkel <anatoly.fren...@stonybrook.edu> wrote:Fluorescence or transmission?What is the Cu concentration? Could be self absorption. AnatolyOn Apr 21, 2023, a

Re: [Ifeffit] SO2 for samples with non-planar geometry

Fluorescence or transmission?What is the Cu concentration? Could be self absorption. AnatolyOn Apr 21, 2023, at 9:31 PM, Joel Brugger wrote:Dear list,We are trying to fit EXAFS from data collected on solutions within a capillary. The capillary has OD 1mm, ID 0.8mm, and was placed horizontally. Th

[Ifeffit] Save the date: XAFS short course at BNL and EXAFS-50 symposium

Dear subscribers, Please save the date for the two back-to-back, *in-person*, events: EXAFS-50 symposium (Oct. 30-31) and annual EXAFS short course (Nov. 1-3, 2023), both to be run at Brookhaven National Laboratory. While the usual format of our short courses is Wednesday through Friday, this year

Re: [Ifeffit] XANES temperature estimation

Only evaporation temperature, when XANES spectrum disappears…:) Anatoly > On Nov 21, 2022, at 10:20 AM, Gabriele GAROFALO > wrote: > > Hi everyone, > > I'd like to estimate the temperature of some samples from some XANES spectra, > is there a way to do that? I couldn't find an answer in the

Re: [Ifeffit] Bug report: Athena, multiple data export

as a > graph, it is hard to tell whether or not the x-axes are the same... And if > you are processing data from someone else, you may not know whether or not > they were collected with the same energy step settings. > > Best, > Soyoung > > On Fri, Oct 8, 2021 at 3:24 PM Anatoly Fr

Re: [Ifeffit] Bug report: Athena, multiple data export

It is not a bug. When groups have unique energy axes they should be saved in different files. Anatoly > On Oct 8, 2021, at 6:19 PM, Soyoung Kim wrote: > >  > Dear Bruce and IFEFFIT community, > > Hope all is well. I found a bug with Athena's file export function. I had two > normalized mu(

Re: [Ifeffit] S02 selection from reviewer

I think that the variability of S02 between different samples, detection methods etc. may or may not be a big concern for you if 1) the error bars in the CNs (that you are not reporting) are larger than the difference in their mean values (that you are reporting), and/or 2) larger than the differen

[Ifeffit] XAFS short course at BNL: Nov. 17-19

Dear subscribers: As it does every year in the Fall, Synchrotron Catalysis Consortium at Brookhaven National Laboratory will run a short course from November 17 to 19 at BNL. As in the last year, when it gathered 80 participants, it will be virtual, and the course will be limited to 80 registered

Re: [Ifeffit] EXAFS fitting sum of all paths in R space

...Basically, you need to sum different paths in k-space, save as chi(k), then import to Athena, perform FT in the same range as your data, and then the result should be the same as obtained in Artemis for the fit vs data. That will preserve the phase relationships between different paths, while yo

Re: [Ifeffit] EXAFS fitting sum of all paths in R space

It is a nice demonstration that |χ(R)| is not equal to |χ1(R)|+ |χ2(R)| + ... |χn(R)|. It is equal to: |χ1(R) + χ2(R) + ... χn(R) |. The latter is most often smaller than the former, according to the Cauchy-Schwarz inequality. Anatoly On Wed, Sep 23, 2020 at 8:58 AM Ashwini Kumar Poswal < posw

[Ifeffit] Postdoctoral fellowship in AI - related field

Please pass this info to anyone interested in this opportunity, particularly, those students who are about to obtain their PhD and looking for postdoctoral fellowships. This one may be suitable for those who plan to use data science approaches for interpreting XANES and EXAFS data and apply them to

[Ifeffit] XAFS short course at BNL: Nov. 18-20, 2020

Dear mailing list subscribers: Please pass this information along to your group members or others who may be interested in this. As it has done every year since 2005, on* Nov. 18-20, 2020*, Synchrotron Catalysis Consortium (SCC) will run an annual short course on X-ray absorption fine structure t

[Ifeffit] Cool math expression

I thought I share a really good idea I found in someone's fit project that was shared with me. Instead of varying deltaR and then doing something like: "after R_final = 2.79 + deltaR" to have Artemis calculate the actual bond length (and then looking for its uncertainty in the list of guess paramet

Re: [Ifeffit] errors in bond lengths

Matthew, In the paper by Purans et al that George references, they showed that the FEFF fitting method and ratio method agreed, and in the ratio method the amplitudes and phases are extracted from experimental standards, just as in your paper. Anatoly On Sat, Apr 11, 2020 at 2:21 PM Matthew M

[Ifeffit] Chris Chantler, Re: XAFS conference proceedings

Dear Chris (if you are reading this), Do you know when the Rad. Phys. Chem. issue with the latest XAFS conference proceedings will be finalized and published online? It currently shows "corrected proofs" but not the articles with pages. Perhaps, it is a bad time to follow up and I am sorry for bo

Re: [Ifeffit] XAFS.ORG WEBSITE??

And where is its treasurer? :) Anatoly > On Jan 29, 2020, at 7:59 PM, Bare, Simon R wrote: > >  > Talking of websites does anyone know what happened to the International XAFS > website? I can’t access it. And what is going on with this organization? > Thanks. > > Simon > > ___

[Ifeffit] Postdoctoral position

Stony Brook University address, with a subject line: Postdoc in heterogeneous catalysis. Thank you, Anatoly Frenkel Professor Department of Materials Science and Chemical Engineering Stony Brook University Stony Brook, NY 11794, Ph: 631-632-2751 Email: anatoly.fren...@stonybrook.edu <ht

Re: [Ifeffit] Two analysts, one spectrum, similar outcome?

Are they equally smart? Anatoly > On Aug 13, 2019, at 9:39 PM, Mike Massey wrote: > > Hi Everyone, > > > I'm curious, has anyone ever tried turning two analysts loose on the same > unknown EXAFS spectrum to see if their fits come out with similar > conclusions? If you have tried it, how did

[Ifeffit] XAFS short course in BNL Nov. 13-15

Dear subscribers: The info about the XAFS2019 short course at BNL is here: https://www.bnl.gov/xafs2019/ The application page is open. Best, Anatoly --- Anatoly I. Frenkel Professor Department of Materials Science and Chemical Engin

[Ifeffit] Postdoctoral position is available

primary technique being X-ray absorption fine structure. This position will be in Stony Brook University (located in close proximity to Brookhaven), under the supervision of Prof. Anatoly Frenkel. Responsibilities will include setting up new in situ operations for testing novel materials under

[Ifeffit] Two postdoctoral openings at SBU and BNL

Laboratory, with primary technique being X-ray absorption fine structure. This position will be in Stony Brook University (located in close proximity to Brookhaven), under the supervision of Prof. Anatoly Frenkel. Responsibilities will include setting up new in situ operations for testing novel

Re: [Ifeffit] Standard deviation of R value

As an additional comment, it is a murky issue whether the reported thing together with R is the standard deviation. It is not easy to find it in the literature but there are some papers dating back to the 1990s that state that the uncertainties reported in the EXAFS fitting results correspond to th

Re: [Ifeffit] TiO2 XAS spectrum

Enyuan, Here are the rutile and anatase spectra with the corresponding Ti foil spectrum. I will send you the name of a student who collected the spectra for acknowledgement when you need it. Anatoly Frenkel On Fri, Nov 23, 2018 at 10:08 PM Enyuan Hu wrote: > Hi all, > > Can anyone

Re: [Ifeffit] data on CdS

Thank you so much, Robert and Bruce! Anatoly > On Nov 17, 2018, at 12:12 PM, Robert Gordon wrote: > > CdS Mu(E) measured in FLY on 20BM in 2013...no simultaneous reference for > energy calibration through...sorry... > >> On Sat, Nov 17, 2018 at 8:58 AM Anatoly Frenkel &

[Ifeffit] data on CdS

Dear all - if someone could share raw Cd K-edge data of CdS, it would be really helpful! Thank you, Anatoly Frenkel ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http

Re: [Ifeffit] Ifeffit Digest, Vol 189, Issue 2

e: Contents of Ifeffit digest..." >> >> >> Today's Topics: >> >>1. Re: Bump/oscillating pattern at high energies of EXAFS >> (Anatoly Frenkel) >>2. Re: Bump/oscillating pattern at high energies of EXAFS >> (Matthew Marcus) &

Re: [Ifeffit] EXAFS of wine

in the mix to give it’s complex berry character and the 2016 is > supposedly better. > How about we take some samples to the lab ... ? > > John > > >> On Thu, Nov 1, 2018 at 16:07 Anatoly Frenkel >> wrote: >> I thought this mailing list is an appropria

Re: [Ifeffit] EXAFS of wine

ey.edu.au >> simon.ja...@florey.edu.au >> >>> On 2 Nov 2018, at 10:11 am, Leandro Acu wrote: >>> >>> I want one! Nothing better for a long synchrotron night! >>> >>> Enviado desde Yahoo Mail para Android >>> >>> El jue.

Re: [Ifeffit] Bump/oscillating pattern at high energies of EXAFS

It is an effect of inhomogeneity of the sample, that is, the variation in the metal density throughout the X-ray beam footprint. Anatoly On Thu, Nov 1, 2018 at 5:34 PM Raj kumar wrote: > Dear All, > > I have monitored the growth process of YbVO4 nanoparticles using EXAFS. > Here, nanoparticles

[Ifeffit] Better late than never

After 15 years or so of using Athena, I just accidentally learned that the vertical scale of the plot can be changed by simply turning the scroll wheel of the mouse! Anatoly ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.

Re: [Ifeffit] Making N (coordination number) a variable.

Make it 1 in the N window and make amp*N expression in the S02 window instead. Then use N as a coordination number (fix or vary it). Anatoly --- Anatoly I. Frenkel Professor Department of Materials Science and Chemical Engineering Sto

[Ifeffit] Postdoc position

Please pass this info along to those who may be interested in this opportunity: There is an opening for a postdoctoral research associate in my group. The postdoc will be stationed in Brookhaven National Laboratory and work as a member of a multi-institution team to develop and apply new methods o

Re: [Ifeffit] Interpreting old XANES data with missing standards

Don, I am sure that Paul Northrup (north...@bnl.gov) will help - he was the beamline scientist at X15B and is likely to have the standards you need. Anatoly --- On Fri, Jun 8, 2018 at 9:54 AM, Don Baker wrote: > Hello All, > > F

Re: [Ifeffit] 4+2 model for distortion

Cute animation. I will now think of dynamic Jan Teller distortion every time I see a flying pigeon. Anatoly On Wed, May 9, 2018 at 10:41 AM, Abdul Ahad wrote: > hi all > How to include this model in atom that is 4+2 or 2+4 for 2short or 4 long > bond length of octahedra > thanks > > > *A. Ahad

Re: [Ifeffit] FeSe2 Se K-edge XANES request

Will the data from the compositions shown in this paper be useful? https://cpb-us-east-1-juc1ugur1qwqqqo4.stackpathdns.com/you.stonybrook.edu/dist/b/1881/files/2016/10/BaFeSe-EXAFS-y9zet9.pdf Anatoly Hi Folks, > > Does anyone have a near-edge spectrum of FeSe2, Se K-edge, they could > share? > (

Re: [Ifeffit] could coordination environment influence edge position of arsenate

This reference may be useful: W. Yan, R. Vasic, A. I. Frenkel, B. E. Koel Intra-particle reduction of arsenite (As(III)) by nanoscale zerovalent iron (nZVI) investigated with in situ X-ray absorption spectroscopy Environ. Sci. Technol. 46, 7018-7026 (2012) Anatoly > On Feb 8, 2018, at 10:55

Re: [Ifeffit] XAFS short course in BNL: Nov 1-3, 2017

Dear all: Resending the previous message: we are still accepting applications through Sep 8. Regards, Anatoly > On Jul 28, 2017, at 3:43 PM, Anatoly Frenkel > wrote: > > Dear subscribers: > > Please share with your group members or others, who may be interested

Re: [Ifeffit] XAFS short course in BNL: Nov 1-3, 2017

y > >> On Sat, Jul 29, 2017 at 3:43 AM, Anatoly Frenkel >> wrote: >> Dear subscribers: >> >> Please share with your group members or others, who may be interested, the >> following information about the short course on XAFS spectroscopy: >> >

Re: [Ifeffit] XAFS short course in BNL: Nov 1-3, 2017

Dear Matthew and all, The link can be copied directly to the browser URL field and it will work: https://www.bnl.gov/exafs2017/ If NEXAFS spectra in some materials can be theoretically modeled as reliably as some XANES spectra in some materials then most methods that we will present should wor

[Ifeffit] XAFS short course in BNL: Nov 1-3, 2017

Dear subscribers: Please share with your group members or others, who may be interested, the following information about the short course on XAFS spectroscopy: Title: *Data Analysis and Modeling of XANES and EXAFS Spectra. Applications to Nanomaterials* Dates: *November 1-3, 2017* Location: *Broo

Re: [Ifeffit] Nearest neighbor statistics in a random alloy

... and if the random alloy is a nanoparticle, the equations are modified (they will be the same as in Qingying's email in the bulk alloy limit and if the NPs are sufficiently large). See here, Eq. (11), for more details: Chem. Soc. Reviews *41*, 8163-8178 (2012)

Re: [Ifeffit] Ifeffit Digest, Vol 172, Issue 15

Weizi, Self absorption occurs in the transmission measurement of the powder because it is a concentrated sample and it has to be exceedingly well made to eliminate the thickness effect. Because it was shown in your previous email to be lower than the film that decrease in intensity was caused by s

Re: [Ifeffit] Self absorption or Ce4+ reduction in the CeO2 film?

Self absorption. There was a similar question a few weeks ago. Anatoly Sent from my iPhone > On Jun 22, 2017, at 11:11 AM, Weizi Yuan > wrote: > > Dear all, > I have measured some spectra of a CeO2 film(~200nm) grown on Yittria > stablized Zirconia(YSZ) substrate under 2 conditions. > (i)

Re: [Ifeffit] Self absorption in CeO2 spectrum

It is all self-absorption (over-absorption) that explains the difference. Ce 3+ will appear as a separate shoulder below the first peak and there is no evidence of this contribution in the spectra. These effects, including the difference between the spectra of the powder and film CeO2 due to s

Re: [Ifeffit] E0 on linear combination fitting: fit or not?

I think (in agreement with Matt's comment) that if the standards are not known to be calibrated to the same energy scale then LCA may not be as useful if done in energy space. But, depending on the problem of course, there could be a good spectral contrast between the data not only in energy but al

[Ifeffit] Save the date: Nov 1-3, 2017, XAFS short course at BNL

Dear Colleagues: Please share with your group members or others, who may be interested, the following information about the short course on XAFS spectroscopy: Title: *Data Analysis and Modeling of XANES and EXAFS Spectra. Applications to Nanomaterials* Dates: *November 1-3, 2017* Location: *Bro

Re: [Ifeffit] Athena and "norm" file groups

etector signals). It is not likely that norm2 (xmu) will give the same results as norm2(norm1(xmu)), although the differences may be small. That is the reason, I think, Athena does not allow any ex post factum normalization to the normalized data. Anatoly Frenkel Stony Brook University On Oct 15,

Re: [Ifeffit] a big big thank-you

Dear Echkard, I wish your thesis has a smooth journey between the Scilla and Charybdis on your committee, Anatoly From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bosman, Eckhard Sent: Monday, November 03, 2008 12:05 PM To: ifeffit@millenia.cars.aps.anl.gov Subject: [If

Re: [Ifeffit] Fw: Re: Fit XANES spectra using Athena

Jenny, Here are some links to the work of A. Vairavamurthy who did extensive research on sulfur speciation, that may help: HYPERLINK "http://www.irnase.csic.es/users/delrio/repository/2002-OLIVELLA-JAAP-63-59. pdf"http://www.irnase.csic.es/users/delrio/repository/2002-OLIVELLA-JAAP-63- 59.p

Re: [Ifeffit] enrgy-axis-expansion

Khalid, what you can do is to note how much the higher energy (at energy E1) feature is shifted from what you think it should be (let's say by the amount of D eV), provided that you fixed the lower energy point to what you wanted (say, E0). Then, you should transfer the data into a spreadsheet and

Re: [Ifeffit] A problem with Athena

Does Athena start at all? Sometimes it takes up to a minute before the Athena window appears. Anatoly _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of NIRAWAT THAMMAJAK Sent: Wednesday, September 03, 2008 1:28 PM To: XAFS Analysis using Ifeffit Subject: [Ifeffit] A pro

Re: [Ifeffit] Linear combination analysis

Sebastiano: Sounds like a martensitic transition since it depends on the annealing time. Thus, as Bruce wrote, XANES and EXAFS may be expected to be different, due to the different lengths scales - if the boundaries of local fcc regions are small. Another origin of this discrepancy in x and y bet

Re: [Ifeffit] 2008 APS XAFS School

Bruce and all: Congratulations on the funding! Anatoly -Original Message- From: Ravel, Bruce [mailto:[EMAIL PROTECTED] Sent: Friday, May 16, 2008 10:08 AM To: XAFS Analysis using Ifeffit Subject: Re: [Ifeffit] 2008 APS XAFS School On Wednesday 14 May 2008 13:39:48 Matt Newvill

[Ifeffit] FW: Brainteaser

I think this answer is as good as the correct one! Anatoly. -Original Message- From: Woicik, Joseph [mailto:[EMAIL PROTECTED] Sent: Friday, April 04, 2008 3:28 PM To: [EMAIL PROTECTED] Subject: RE: Brainteaser oh, i got it, you right clicked when you should have left clicked.

Re: [Ifeffit] Brainteaser

using Ifeffit Subject: Re: [Ifeffit] Brainteaser On Thursday 03 April 2008 21:52:46 Anatoly Frenkel wrote: > A comment: the last time NSLS had 20h of stored beam lifetime was in the > 20th century, I think, but it is besides the point. At this moment, according to the machine status on t

[Ifeffit] FW: Brainteaser

ybe I should have replied privately to give others a chance to weigh in, or put ***spoiler warning - possible solution in the subject line. My apologies to all! mam - Original Message - From: Anatoly Frenkel <mailto:[EMAIL PROTECTED]> To: 'Matthew Marcus' <

Re: [Ifeffit] Brainteaser

le It is fixed below the edge, so ln(I0/It) decreases as observed. With this explanation, and noting that ln(I0/It) decreased by about 0.05 in an hour, I infer that the stored-beam lifetime is ~20hr. mam - Original Message - From: Anatoly Frenkel <mailto:[EMAIL PROTECTED]>

[Ifeffit] Brainteaser

Attached is a brainteaser which I think is cute. Too late for the April fool's day but still... Some comments: three consecutive scans of the same sample were taken in this order: scan 1, 2 and 3. Duration: 30 minutes per scan. If these data look unusual to you please tell us why and what could'

Re: [Ifeffit] Is there a Artemis User's Guide like the Athena?

at they are thin on details and somewhat out of date. > > The last bit of advice I can give you is to read the papers written by > the names you see on the Ifeffit mailing list. The folks who offer > answers to question on the list are also some of the best > practitioners of EXAF

Re: [Ifeffit] conversion to Artemis k^0*chi(k) form

Matthew: IFEFFIT users have their chi(k) data already interpolated to 0.05A^-1 grid at the stage when the E-space data (x*mu or mu) are saved in k-space as chi(k). Anatoly -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Sent: Friday, Nov

Re: [Ifeffit] SA and issue with importing into Artemis

09 November 2007 12:26:33 Anatoly Frenkel wrote: > I tried with Athena v50 and Artemis v007 and it worked You should consider updating. ;-) B -- Bruce Ravel --- [EMAIL PROTECTED] National Institute of Standards and Technology Building 535A, Room M7

Re: [Ifeffit] SA and issue with importing into Artemis

Richard, I tried with Athena v50 and Artemis v007 and it worked (the data were ported correctly). I do not think it is version dependent. The data that you save in Athena are ported to Artemis with 0 k-weighting, so you have to manually set your k-weighting in artemis if you want to match the s

Re: [Ifeffit] Self absorption questions

Matthew: It is a beautiful summary. Thanks for putting it together. Here is another reference, for your collection: A. Ryazhkin, Y. Babanov, M. Takafumi "Thickness inhomogeneity and fluorescence effects in EXAFS spectroscopy for powder samples: solution of the inverse problem". J. Synchrotron

[Ifeffit] SCC Mailing List

general, I hope the SCC-Forum list will be a useful resource for you. Any comments, please let me know. Anatoly Anatoly Frenkel, Professor Department of Physics, Yeshiva University 245 Lexington Avenue, New York, NY 10016 http://www.yu.edu/faculty/afrenkel Spokesperson, Synchrotron

Re: [Ifeffit] help with CoCr bimetallic catalyst

being finalized), or collaborate with someone experienced on the list. As Scott Calvin is reasonably close to Yale, he may be your best bet. If you are willing to expand your radius and travel to Brookhaven for a few days, my postdoc Adele Wang could help too. Regards, Anatoly Anatoly Frenkel Ye

Re: [Ifeffit] white line intensity v. edge position indeterminingoxidation state of Re

I agree with Bruce on this, and would like to add that in nanoparticles the very Fermi energy may be shifting around - as a function of size, metallicity, support-particle interaction, etc. For example, in bulk materials, the change in the oxidation state of an absorber by, say, -1, due to reductio

Re: [Ifeffit] How to select important MS paths in wurtzite?

By some reason, when I googled "wurtzite structure", the first link with an image was to the following page: http://britneyspears.ac/physics/lipgloss/gloss.htm and they even posted her picture in the bottom, next to the wurtzite structure. Weird. I would add to Bruce's and Scott's comments: If

Re: [Ifeffit] How to use "OVERLAP" card?

;d recommend reading papers by Scott Calvin or Anatoly Frenkel onnanoparticles or by Shelly Kelly on uranium in biogeochemical systems for excellent examples of how that sort of analysis is done.Hope that helps,B -- Shanghai Institute of Applied Physics, Chinese Academy of Sciences No. 2019, B

[Ifeffit] 2007 NSLS XAFS workshop: save the date

is. Advanced methods and tricks in data analysis. Course information will soon appear on the Synchrotron Catalysis Consortium (www.yu.edu/scc) and National Synchrotron Light Source (www.nsls.bnl.gov) web sites. Anatoly Frenkel Associate Professor Department of Physics, Yeshiva University 245 Lexing

Re: [Ifeffit] Coordination of ball-milled alloys

: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Anatoly Frenkel Sent: Friday, May 04, 2007 2:32 PM To: XAFS Analysis using Ifeffit Subject: Re: [Ifeffit] Coordination of ball-milled alloys Have you measured Fe edge in this alloy, and if yes, have you tried to fit the data measured from

Re: [Ifeffit] Coordination of ball-milled alloys

Have you measured Fe edge in this alloy, and if yes, have you tried to fit the data measured from both Fe and Cr edges simultaneously? I would do it first, without varying the mean free path. It will definitely reduce correlations between N and ss2, which seems to be a problem here. Whether or not

Re: [Ifeffit] large Eo's and neg. D-W factors

My observation (not rigorously tested though): the longer it takes to get a good fit, the more suspicious are the results! Anatoly -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Richard Mayes Sent: Wednesday, May 02, 2007 8:56 AM To: XAFS Analysis using If

Re: [Ifeffit] Platinum Rhenium EXAFS in Artemis

> I was also > if its possible to use Athena or Artemis to extract the back-scattering > properties of Pt and Re from reference samples, and use these properties in > fitting a Pt-Re path. We did a similar procedure (extracting back scattering properties from reference samples), although with FE

Re: [Ifeffit] setting root for artemis and athena

Katy, In Artemis, Go to Edit Preferences --> general--> remember_cwd and check "Value remember_cwd" (default is unchecked). In Athena go to Settings (top right) and then the same. Please let us know how the piano lessons are progressing, Anatoly -Original Message- From: [EMAIL

Re: [Ifeffit] Fitting EXAFS with out any atomic coordinates?

erial. EXAFS analysis is something of a creative endeavor -- the trick is to figure out how to use things that you know to model things that you don't know. Reading papers by the folks who answer questions on this list (Scott Calvin, Shelly Kelly, Anatoly Frenkel, Paul Fons)

Re: [Ifeffit] FEFF 6L.02

It is probably because I know Bruce for so long that I give almost identical replies to my students who email me: "Dr. Frenkel, I tried to solve a homework problem but it did not work. What did I do wrong?" Anatoly -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On B

Re: [Ifeffit] question about Eo and simultaneous fitting

It is true that in many cases oxidation/reduction affects the low k-range behavior in chi(k), but if the second shell (metal-metal) frequency is not affected, the data can still be aligned by focusing at the high k-portion of the data, so what Shelly suggested, may be, in principle, done. Anatoly

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

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?" A. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of

RE: [Ifeffit] CN and bond distances in Artemis

5.54 for a 13 atom cuboctahedron (same in truncated octahedron and an hcp cluster) and 6.46 for a 13 atom icosahedron. A. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Juan Antonio Macia Agullo Sent: Tuesday, December 12, 2006 1:15 PM To: XAFS Analysis us

RE: [Ifeffit] CN and bond distances in Artemis

Dear JA, "For the record", I don't recall saying anything to the effect that S02 = 0.2 "is close to the case of Pt nanoparticles" - which would be wrong since the smallest number for 13 atom particles is that of the cuboctahedron: 5.54. Thus, the ratio of 5.54 and 12 makes it 0.46. That means, if

RE: [Ifeffit] CN and bond distances in Artemis

d be willing to provide that data. Unfortunately, the Newville database doesn't have it, and I don't think I do. Anatoly, surely you must have done Pt foil? Yes, I know it's best to measure everything on the same beamline, but it's not essential. mam - Original Message --

RE: [Ifeffit] CN and bond distances in Artemis

I would remeasure Pt foil in transmission, by all means. Anatoly -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Juan Antonio Macia Agullo Sent: Tuesday, December 05, 2006 1:32 PM To: XAFS Analysis using Ifeffit Subject: Re: [Ifeffit] CN and bond distances

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