Nice effect in NaI(Tl) crystal!

Scintillation crystals, PMTs, voltage dividers etc...
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luuk
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Nice effect in NaI(Tl) crystal!

Post by luuk » 10 Oct 2018, 07:19

Hi guys,

I found an interesting effect in a 2x2"NI(Tl) crystal that I think you would like to see to.
Please read the pdf.

Luuk
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Interesting effect in a NaI(Tl) crystal !.pdf
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Steven Sesselmann
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Re: Nice effect in NaI(Tl) crysal!

Post by Steven Sesselmann » 10 Oct 2018, 10:46

Luuk,

This is fascinating, thanks for sharing.
I have occasionally get brand new encapsulated NaI(Tl) crystals which look perfectly clear, but still have bad resolution >10% but I have never considered trapped light.

Steven
Steven Sesselmann | Sydney | Australia | gammaspectacular.com | groundpotential.org | rephopper.com | beejewel.com.au |

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iRad
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Re: Nice effect in NaI(Tl) crysal!

Post by iRad » 10 Oct 2018, 10:47

Luuk - Thanks for sharing. I did not know that afterglow could be a problem with NaI(Tl). Nice detective work. Tom
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luuk
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Re: Nice effect in NaI(Tl) crysal!

Post by luuk » 11 Oct 2018, 04:40

Hi Steven,
I have never seen this before with a NaI(Tl) crystal and I have been working with crystals for almost 40 years so it is a real exception!
The point is that you cannot see it unless you have a bare crystal, the glass mounted in the detector will block all uv light.
Luuk

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