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

Didn't take the ln of the FLY by chance? ...after processing foil in transmission? just trying to think of anything else dead time of the FLY detector? (solid state assumed...DT correction applied?) -R. On 2023-04-21 7:31 p.m., Joel Brugger wrote: Thanks Rob., Good thought, but definitive

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

Thanks Rob., Good thought, but definitively Cu++; we get the right energy shift and the right shape for XANES (linear Cu+ is very distinctive). We actually maintain nice oxidising conditions (4 bar of air applied to the capillary), and the spectra were stable over time (slew scan mode, with ~5

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

Hi Joel, How much edge shift are you seeing between your foil and the solution? Cu+2 is about 4.5 eV up from Cu metal...you seeing about that much? Cu+2 can photoreduce...I know Cu+(aq) isn't stable, but maybe some complex is forming? Just a thought...CN=2 and I think linear Cu+ -R. On 2023-

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

Capillary is silica glass :-) > On 22 Apr 2023, at 11:57 am, Anatoly Frenkel > wrote: > > Capillary made or what? > > Anatoly > >> On 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 >>> mailto:anatoly.fren...@stony

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 wrote:Fluorescence or transmission?What is the Cu concentration? Could be self absorption. AnatolyOn Apr 21, 2023, at 9:31

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

Fluo, 0.5 wt% Cu. > On 22 Apr 2023, at 11:41 am, Anatoly Frenkel > wrote: > > Fluorescence or transmission? > What is the Cu concentration? Could be self absorption. > > Anatoly > >> On Apr 21, 2023, at 9:31 PM, Joel Brugger >

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] SO2 for samples with non-planar geometry

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. The beam is 1x2 mm (VxH). Fitting the copper reference foil, we get the expected SO2 value of ~0.7. However, the solution containing the C