[Ifeffit] CN and bond distances in Artemis

[Carlo Segre]

On Tue, 5 Dec 2006, Juan Antonio Maciá Agulló wrote:

>
>
> Ok, how can I apply an "infinite" sample correction? The other samples are
> measured also in fluorescence mode, then is it better to measure Ptfoil in the
> same conditions (fluorescence)?
>

The question about applying the correction has been answered.  As to your 
question about the standard being measured the same way as the samples. 
yes, it is important to have standards be the same but not if you are 
compromising the data quality.  If the sample is mad efor transmission it 
is not necessarily the right sample to measure in fluorescence.  Perhaps a 
thin film of Pt would be a better fluorescence sample.  Something with 
signficantly less than an absorption length of thickness.  In my 
experience, mixing modes (transmission and fluorescence) is OK if you are 
careful about drawing conclusions.  For example, a Pt foil is a geed 
standard because it permits you to see if you can get a consistent 
amplitude reduction factor which you can then use for your nanoparticles. 
For this purpose transmission is fine.

If you want a Pt standard that is like your samples, then Pt black would 
be better but you know that it will have a reduced SO2 as well because it 
is in nanoparticle form.

Cheers,

Carlo


> Thanks a lot
>
> Best regards,
> JA
>

-- 
Carlo U. Segre -- Professor of Physics
Associate Dean for Special Projects, Graduate College
Illinois Institute of Technology
Voice: 312.567.3498            Fax: 312.567.3494
segre at iit.edu   http://www.iit.edu/~segre   segre at debian.org