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Suppose your Pu is Pu-243 you’ll get an Am decay x-ray Pu-239 a U x-ray. If its Np-234 you get a U decay x-ray, if its Np-237 it’s a Pa x-ray. For Pa-234 you get a U x-ray if its Pa231 you get an

" A Pu decay U x-ray looks like a Pa U decay x-ray or any other U x-ray" I mentioned Pa-234m decay to U-234 before. Pa-234m decay can be eliminated by the lack of other peaks at the appropriate

That was not missed by them even though it’s a wet chem. Pu extraction aliquot, but you cannot assign these x-rays to any particular source. So its labeled a U x-ray not Pu. A Pu decay U x-ray

An interesting chart from a study by Los Alamos National Lab concerning precision mass spectrum analysis of Trinitite. It shows there is an across the board 3 orders of magnitude more Pu-239 atoms per

It has been rumored that Crayola (of crayons fame) has a new brilliant blue crayon called bluetiful. What is its elemental composition is the question. The first to submit an MCA file documenting

Taray, Looks good with the 2048. There are two things that could be done for your setup. The first is the count time, you really need much more count time to resolve things especially close lines and

Charles? I plan to do that next Can just let it run by itself for hours Have seen it working? But not keen in this case The composition of these supplements may be altered by

Taray, So why don't you let this run for a long time so you can get some decent counts? Se is almost certainly there but to identify the other peaks with certainty you will need more than 1024

OK, your Np L X-Rays are spot on, so good job.You are getting no 59.5 backscatter?Geo

GeoYes?Used centroidIt was quite a struggle?The software has a bad habit of rejecting?Taray

Hi Taray, did you re calibrate after changing to 2048 channels? I'll be glad to walk you through it if needed. Geo To: [email protected] Sent: Friday, October 23, 2020 8:35:07 AM Subject: Re:

Charles I repeated the scan with some tabs in a plastic The spectrum is quite alike Did a 2046 channel with gain upgrade Not a long spectrum.. I am primarily interested in scanning some supplements as

Conclusions- Based on the short tests of each available peaking time settings, in the first post of this topic: 4.8us (what we've been using until now), is adequate and could be retained for general

Dud I upgraded to 2048 with higher gain . I repeated the x ray apron It? is? Pb/Sn like you? said Pb /Bi? lines are tricky and adjacent on the periodic table Taray

ATTACHED: ,mca for 19.2us Peaking time with same settings as 4.8us PT .mca for 19.2us Peaking time with new auto tune fast-slow routine run To auto tube the source must be removed, which is all part

Geo / Charles, Changing only the peaking time is not going to give you a good idea of what an optimal setting should be. These things interact with each other and need to be set together, The noise

Run it for the same time change only one variable at a time Dud Sent: Thursday, October 22, 2020 8:52 AM To: [email protected] Subject: Re: [XRF] Si-PIN Detector PEAKING-TIME-TEST This next scan

No not auto resetting LLD etc. I believe you must remove the source to do that. I'll include that on the way back down from 25.6 us which to my eye is the sweet spot. This series is looking at gross

Geo, Did you auto reset the fast and slow thresholds for the 9.6 usec count? Note the input count well exceeds your total count meaning there is still a lot of low energy noise that needs to be taken

I don't know why Charles. That's more a question to be answered by a digital expert. George Dowell Geo To: "XRF" <[email protected]> Sent: Thursday, October 22, 2020 10:56:10 AM Subject: Re: