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What is interesting is the ratio of intensity of 235/238. Of course, nuclide production, decay activity and contribution of Unat must be considered but it still seems off. Steve

He did weigh the sample Steve, but then he digested it in Hydrofluoric and Nitric acid. after drying he must have measured it again? Anyhow I don't know but would guess yes they can do that.

Is there any way to convert intensity to ppm or ppt? Steve ________________________________ Sent: Tuesday, September 29, 2020 4:05 PM To: [email protected] <[email protected]> Subject: Re: [XRF] Trinitite

Possibly a mix up. I did a fresh scan cos I din save the previous mca file I thought I picked up the same one I do have many apron samples

"Neptunium", a YouTuber did an ICPMS mass-spectrum? of Trinitite. From the data presented on isotope ratios these are of most interest to us: Analysis? ? ?Intensity U-235? ? ? ? ? ?1523.1

Geo, I think you’ve gone as far as you can without calculating a Pu concentration from the Am and determining the x-ray yields. The Pu derived U x-ray peaks of La1, Lb1, Lg1 and Ll you see in the

*U-238* Let's walk through Uranium Radioactive Decay Schemes, one U isotope at a time to clarify the reason we see certain peaks on spectroscopy scans. We use the convention in this science that:

Taray, Is this a different apron? The accumulation times and dates are different and the spectra look different Sent: Tuesday, September 29, 2020 4:22 AM To: [email protected] Subject: Re: [XRF] Si pin

A closer look at a Gamma RaySpectrum scan of Red Trinitite? (see pics in first post of this thread). The picture and .mca attached are of a previous (19FED2020) scan of Red Trinitite In the photo you

Here is the x ray apron file. Taray

Guys Thanks for the tips Geo and I had a running commentary setup Next time mca files will follow Yep Rubbery feet is blocking heat loss Just din strike me.. I have a rounded block of metal which I

Geo, It looked like a 1024 conversion gain. Most Si detectors will use 2048 even at the expense of counting time. Count time, FWHM, and noise can be traded off using peaking time…its always

Good to know that Thanks Dud.Some mass spectrometer test of Trinitite et. al results are out there on the internet, will gather a few and see if they are showing parent, decay and fission products

LOD depends on the element but in general the XRF limit of detection at best is 0.5 ppm and above, so for a ppb range element you’ll need to do ICP/MS. That can also get stable element isotopic

I loaded the ZIP file to the c: documents/raddecay folder and extracted it there. Then did a shortcut of the exe file to the desktop. You should be able to select where to install when you extract it.

Dud, with the XRF gun, what is the likelihood of detecting a unique element in a large Trinitite sample, when the element dispersed and total weight is 1x10e-9 grams? Say the sample was 28 grams. Geo

The same scale expansion can be done selecting the Select View box on the tool bar. The cursor changes to a + and by holding the left mouse button you can select the range to expand. Click the < >

Dude, I did the energy cal here when I built it. Used test sources. Geo To: [email protected] Sent: Monday, September 28, 2020 12:42:20 PM Subject: Re: [XRF] Si pin xrf ..1st go Nice clean spectra,

Nice clean spectra, lookin’ good. You can take the conversion gain up to 2048 channels which will get a bit more resolution at the expense of a longer count time. If you are talking about a peak