Dear All,
I have some basic questions that are more related to the practical
handling of the samples rather than the concept.
1) Recently we had to prepare for the Cu and Pd samples and I had carried
out the calculations of how much material will be needed for such
measurement to get relatively good uT and deltauT values. For such purpose,
I used the program developed by SPring-8 (on their website) dedicated for
BL-14 beamline. In this program we can put in the cell diameter and what
kind of BN thickness is needed. Since my samples are metal immobilized
heterogeneous organic materials, it has a lot of background in terms of
C,H,Si,N etc. Thus, I use material directly and I do not use BN at all. So
my BN thickness is 0. How do I change this mass of material needed into the
thickness of cell? What I do, is I use density of material and for the
cylinder of pellet I calculate the thickness. My question is, WHAT GETS THE
PRIORITY, THICKNESS OR MASS of material that goes in? Becuase thickness of
pellet governs the XAFS equation, whereas mass governs the absorption peak
(height and high uT). It is difficult to comprehend everything written on
website, Since the website is in Japanese and I am not. Also it is kinda
difficult to communicate with the authorities directly in free English, I
am asking this question here.
2) Secondly, In the mixed metal case of type AB, If I focus the energy for
A, how will the B have effect on the scattering of A. A=Cu and B=Pd. I will
be measuring Pd in later days. Would it be possible to consider Pd (in this
case) as a neighboring atom and purely treat it like I would otherwise e.g.
N or O like that?
Since this is my first time with mixed metal situation, any reference
publications or material to read would be very helpful.
3) In another case of mine, I have Pd and Pd2+ mixture in my sample. Would
it be possible to estimate the exact concentration of each of them? Using
two analytically pure Pd and Pd2+ salts to make calibration curve would it
be possible to get the exact concentration? What will be the independent
variable on the graph?
.
Thank you for your kind help and information, in advance
Best
Pushkar
--
Best Regards,
Pushkar Shejwalkar.
Post-doctoral -Researcher,
Tokyo Engineering University,
Tokyo-to
Japan
