Yellow NaI cristal

Scintillation crystals, PMTs, voltage dividers etc...
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Joined: 07 Oct 2016, 01:45
Location: Germany

Yellow NaI cristal

Post by Peter-1 » 08 Nov 2016, 00:04

In my crystals is also a crystal with a yellow color. Now I wanted to see if it still works.
NaI-defekt.jpg (65.5 KiB) Viewed 1333 times
Here the two spectra with a clear and the yellow crystal.
NaI-defekt-Spec.jpg (109.27 KiB) Viewed 1333 times
Only scrap !

Posts: 241
Joined: 01 May 2015, 21:00
Location: the Netherlands

Re: Yellow NaI cristal

Post by luuk » 08 Nov 2016, 03:28

Hi Peter,

Nice test, you can see clearly that a yellow crystal is still working but the light output is lower, the peaks are lower and shifted to the left and the low energies are absorbed by the oxidation and are nearly gone.
But scrap ? I don’t think so, the crystal is still usable as a counter, than it will work almost as good as a dry crystal.


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