xrf setup help?

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Posts: 1
Joined: 31 Mar 2018, 21:15

xrf setup help?

Post by mkxsensors » 31 Mar 2018, 21:36

Hi Everyone,

I'm an electronic engineer doing mainly design but now also lots of testing of particle sensors. (Alpha, Beta, X-rays) As I'm not an expert in X-rays, sorry for lack of the proper terminology.

But I'll get to the point.
Lately we have obtained a diffractometer and two different X-ray tubes (Cu and Mo). For now we use the diffractometer in simplified configuration. The X-rays going out of the lamp go directly to the monochromator in the sample chamber and then we shine on the detector just with the K-alpha energies.

This works really nice when we want to do some imaging, but since our sensors have good energy resolution I would like to have a way to see more energies (peaks) in the measured spectrum. Of course the easiest way, I guess, is to put thin foil of a different material (with K-alpha lower than the tube) in front of the sensor and then I would see 2 energies.

But what I want is have a multi-peak spectrum, with peaks not to far from each other, demonstrating good performance of the sensor.
This is why I was thinking about doing XRF-like measurements.
My questions to you are:
- what is the best configuration to do this (shining on a tilted sample with the X-ray beam and having the detector also at the angle?)
- what could I use as a sample that can be easily obtained. I know that there are some NIST reference samples but we have low budget.. so a hackers approach is needed - a pill of aspirin maybe? :)
- could you recommend some books/manuals/lectures with "hands-on" approach that deal with this kind of measurements?
- is it really what I need? could I also demonstrate a good energy resolution by doing measurements in a diffractometer configuration? (lamp-sample-monochromator-detector?).

I'm open to your suggestions.
Thanks a lot.


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