Gamma Spectrometry Forum

Congratulations, very cool experiment.

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Hello, do anyone have knowledge about theremino software mods ? I saw an image on a website of theremino MCA V7.4 but with more ref buttons, is this some kind of configuration or is it a modification on the software itself ? original software: https://i.ibb.co/CpN6Mgkt/butoes-original.jpg i saw an i...

You can use many elements for shielding, the reason to use a graded shield is each layer to be the shield for the XRF radiation of the previous layer. As a rule higher atomic number are better gamma shields, but higher atomic numbers have more electron levels and produce higher energy radiation. Lea...

my example of the use of diferent shielding materials, with the result after each layer. https://i.ibb.co/RG6tS4c2/2025-03-10-shield-teste-01-b.png On the graph I dont have the line with the Cu layer because on this scale the efect is not visivel, I would have to make a graph without the base line w...

Hello,

I have a very small amount of thorium oxide for sell.

private message for details

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Does it runs on windows 7 ?

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Small shielded boxes are a not pratical for bigger samples or for placing samples at some distance from the sensor. I decided to build a big box. the outer box is wood box, inner lenght 60 cm. https://i.ibb.co/SDMc6RKL/01-outer-box.jpg the inner box is a plexiglass box, lenght 50 cm, covered with co...

I have sheets of copper for sale. contact me by private massage. 0,5 mm x 50 cm x 20 cm sheets. if you need bigger tham 20 cm I can get it. https://i.ibb.co/nMgr7yNn/photo-2025-04-02-00-42-28.jpg Adicional data, for 30 keV ( Sn Xray ) Half Value Layer Thickness of Cu is 0.07 mm, this means that 0,5 ...

if you dont know the thickness of the Al layer, you can try to get that value indirectily, one source, Am241 would be a good candidate, make a spectrum reading , them use a sheet of known thickness of the Al, and make a second spectrum, when the thickness of the Al is the same as the thickness of th...

Adicional data, for 85 keV

Half Value Layer Thickness of Sn is 0.31 mm