Re: [Ifeffit] [Ext] Dumb question

2023-02-16 Thread Robert Gordon 
So your goal is to plot If/I0 versus time for a given energy in the XANES.
Are you exporting normalised XANES or just If/I0?
Are you doing background removal from the pre-edge?

Is another feature underlying this targeted feature also disappearing or
changing? i.e. you are not watching a feature
increase from zero but instead changing from one to another? ...or seeing a
background increase as well?

Was the fluorescence measured using a solid state detector? Did the
deadtime of the detector increase significantly
as the signal from the sample increased (and no deadtime correction
applied) ?

-R.



On Thu, Feb 16, 2023 at 10:53 AM Roberta Candela  wrote:

> Ha no worries! It would be Ifinal over time (to my vague understanding).
> I’m trying to show that the sample was saturated by looking above the
> fluorescence k-alpha line (or I guess it’s called the white line?) because
> the intensity should increase and then level off once it’s saturated. This
> is a xanes scan but we were doing fluorescence instead of transmission
> since it was a dilute sample.
> Did that answer the question? My apologies I’m very new and I’m sure im
> referring to things incorrectly.
>
>
>
> Sent from Yahoo Mail for iPhone
> 
>
> On Thursday, February 16, 2023, 12:45 PM, Carlo Segre 
> wrote:
>
> Hi Robert:
>
> What, exactly are you interested in plotting?  It is not quite clear from
> your message.  Is it the Io as a function of time during a scan?  Is it the
> XANES scans as a function of time for a reaction?
>
> Carlo
>
> On Thu, Feb 16, 2023 at 11:59 AM Roberta Candela  wrote:
>
> Hi all, I am attempting to graph a simple plot of intensity vs time for
> some supplemental info on a paper (from XAFS data from beamtime). I thought
> it should be simple enough since I can export I0 and If from Athena and I
> know the run time and time per data point but I can’t get anything that
> looks remotely like the logarithmic graph it should be. Am I missing some
> big fundamental point for why this isn’t possible? My apologies if this is
> way too vague!/I feel like I’m missing something super obvious
> Thank you for your time!
> Sincerely
> -B
>
>
> Sent from Yahoo Mail for iPhone
> 
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> --
> Carlo U. Segre (he/him) -- Duchossois Leadership Professor of Physics
> Professor of Materials Science & Engineering
> Director, Center for Synchrotron Radiation Research and Instrumentation
> Illinois Institute of Technology
> Voice: 312.567.3498Fax: 312.567.3494
> se...@iit.edu   http://phys.iit.edu/~segre
> 
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Re: [Ifeffit] [Ext] Dumb question

2023-02-16 Thread Roberta Candela 
Ha no worries! It would be Ifinal over time (to my vague understanding). I’m 
trying to show that the sample was saturated by looking above the fluorescence 
k-alpha line (or I guess it’s called the white line?) because the intensity 
should increase and then level off once it’s saturated. This is a xanes scan 
but we were doing fluorescence instead of transmission since it was a dilute 
sample. Did that answer the question? My apologies I’m very new and I’m sure im 
referring to things incorrectly. 


Sent from Yahoo Mail for iPhone


On Thursday, February 16, 2023, 12:45 PM, Carlo Segre  wrote:

Hi Robert:
What, exactly are you interested in plotting?  It is not quite clear from your 
message.  Is it the Io as a function of time during a scan?  Is it the XANES 
scans as a function of time for a reaction?
Carlo
On Thu, Feb 16, 2023 at 11:59 AM Roberta Candela  wrote:

Hi all, I am attempting to graph a simple plot of intensity vs time for some 
supplemental info on a paper (from XAFS data from beamtime). I thought it 
should be simple enough since I can export I0 and If from Athena and I know the 
run time and time per data point but I can’t get anything that looks remotely 
like the logarithmic graph it should be. Am I missing some big fundamental 
point for why this isn’t possible? My apologies if this is way too vague!/I 
feel like I’m missing something super obvious Thank you for your time!Sincerely 
-B


Sent from Yahoo Mail for iPhone
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-- 
Carlo U. Segre (he/him) -- Duchossois Leadership Professor of PhysicsProfessor 
of Materials Science & EngineeringDirector, Center for Synchrotron Radiation 
Research and InstrumentationIllinois Institute of TechnologyVoice: 312.567.3498 
           Fax: 312.567.3494se...@iit.edu   http://phys.iit.edu/~segre   
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Re: [Ifeffit] [Ext] Dumb question

2023-02-16 Thread Carlo Segre 
Hi Robert:

What, exactly are you interested in plotting?  It is not quite clear from
your message.  Is it the Io as a function of time during a scan?  Is it the
XANES scans as a function of time for a reaction?

Carlo

On Thu, Feb 16, 2023 at 11:59 AM Roberta Candela  wrote:

> Hi all, I am attempting to graph a simple plot of intensity vs time for
> some supplemental info on a paper (from XAFS data from beamtime). I thought
> it should be simple enough since I can export I0 and If from Athena and I
> know the run time and time per data point but I can’t get anything that
> looks remotely like the logarithmic graph it should be. Am I missing some
> big fundamental point for why this isn’t possible? My apologies if this is
> way too vague!/I feel like I’m missing something super obvious
> Thank you for your time!
> Sincerely
> -B
>
>
> Sent from Yahoo Mail for iPhone
> 
> ___
> Ifeffit mailing list
> Ifeffit@millenia.cars.aps.anl.gov
> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
> Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit
>


-- 
Carlo U. Segre (he/him) -- Duchossois Leadership Professor of Physics
Professor of Materials Science & Engineering
Director, Center for Synchrotron Radiation Research and Instrumentation
Illinois Institute of Technology
Voice: 312.567.3498Fax: 312.567.3494
se...@iit.edu   http://phys.iit.edu/~segre   se...@debian.org
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[Ifeffit] Dumb question

2023-02-16 Thread Roberta Candela 
Hi all, I am attempting to graph a simple plot of intensity vs time for some 
supplemental info on a paper (from XAFS data from beamtime). I thought it 
should be simple enough since I can export I0 and If from Athena and I know the 
run time and time per data point but I can’t get anything that looks remotely 
like the logarithmic graph it should be. Am I missing some big fundamental 
point for why this isn’t possible? My apologies if this is way too vague!/I 
feel like I’m missing something super obvious Thank you for your time!Sincerely 
-B


Sent from Yahoo Mail for iPhone
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