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Geo, Why is there 4.8mm of Al attenuator in the beam path? What is the no collimated diameter of the micro-focus beam on the target? Is it well aligned with the 1mm collimator, if it’s not

Geo, Getting only 1800 counts/sec in 600 sec is saying something is not quite right with the setup. Not separating the Fe and Ni Kb and Ka is also not right but may be related to the low count

Baby steps- a 304 stainless bolt from the shop. Geo

Thanks Randall! This is great fun and it's nice to be able to watch the peaks build real-time. It seems the best thing is to do is take a reading at 60 seconds, 300 seconds and 600 seconds for the

Very nice bit of detective work, Congratulations, Geo. Randall

There is a scheme where the main exciter, say an X-Ray tube or isotope, excites an intermediate target, causing XRF rays, which in turn are used to excite the main target. This method allows the

yeah here it is. Ka1 Kb1 together. Now to try to merge some L lines in there.

didn't you send me one before that was combined> I'm looking for it now as a place to start.

I’m not sure what the Amptek look up library can handle. It seems it only is set up for a Ka Kb or La Lb can we mix K’s and L’s in there as well and have it report correctly? Inquiring minds

I agree, at a minimum a library of the Periodic Table elements, one or two at a time well separated with no overlapping peaks, with all 4 lines, Ka, Kb, La, Lb. Geo

Geo, The Rb you’re looking at , sorry, the computer is looking at is U Ka at 13.6, Rb has a Ka of 13.4 they can get confused if the ROI is not selected correctly. However in this case the Amptek

Here's the 600s scan after doing the work on the beam and lid.Take a good look at Te and Ru lines, can those be real?

sounds like a great plan, but they count the seconds on their X-Ray tube and won't do any favors......Unless maybe I say I have 500 pounds of "this material" what is it worth?

Geo, Attached is a manually selected ROI showing the Cr, Fe, Mo, and the missing Ni. Using auto generated ROI computer picks usually are not very helpful and in the end its probably best to set your

Geo, My system cal uses a 316 SS disk. Take the wire with you and see if they have a xrf metal analyzer and get an ID that way. Dud Sent: Sunday, February 2, 2020 8:15 AM To:

Seems shorter runs with higher HV and lower uA make a better scan, like Dudley mentioned about pileup. On this one, set the HV all the way up, brought the uA up until deadtime started showing, set uA

Update- Bassetite, Si-PIN in new chamber, 10mins 40kV/30uA. Does Bassetite normally contain Rb and Sr? I'll crank it up and look at the lanthanides next.. Geo>K0FF

Right now the chamber has a 1" thick aluminum lid, topped with several thin lead "blankets", a flexible shielding material. No leakage out of the top but more importantly no Pb XRF from the old lid

The original simple lead (Pb)? lid worked great as a shield but was giving stray Pb XRF peaks to the detector. To fine tune it, different combinations of aluminum topped with lead were tried and