Tritium spectrum

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luuk
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Joined: 01 May 2015, 21:00
Location: the Netherlands
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Tritium spectrum

Post by luuk » 03 May 2015, 20:33

Please read the attachment.
Luuk
Attachments
Tritium light spectrum.pdf
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pietkuip
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Location: Växjö, Sweden
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Re: Tritium spectrum

Post by pietkuip » 06 May 2015, 07:56

Why could not this be Bremsstrahlung? The beta particle has energies up to 18.6 keV. The low-energy x-rays get absorbed by the air, the glass, the window.
Pieter Kuiper, Växjö (Sweden)
Course lab: 3 mCi neutron source; five 3" NaI(Tl) detectors, CdZnTe detector (Amptek); lead bricks, two GDM 20

luuk
Posts: 246
Joined: 01 May 2015, 21:00
Location: the Netherlands
Contact:

Re: Tritium spectrum

Post by luuk » 07 May 2015, 04:52

Hallo Pieter,
I am not a physicist but an electronic engineer but I was always told that bremsstralung is shown as a continuum is and I see a clear peak not a continuum.
I spoke with my boss(a physicist) about it and he also did not thought it was bremsstralung, but could not explain what it was.
Luuk

pietkuip
Posts: 56
Joined: 29 Apr 2015, 06:23
Location: Växjö, Sweden
Contact:

Re: Tritium spectrum

Post by pietkuip » 25 May 2015, 21:39

I put one of these Gaseous Tritium Light Sources in front of our Amptek silicon detector over the weekend. It has better resolution. Most of the spectrum is Bremsstrahlung, but there are also two clear peaks. Those are the characteristic emission lines of zinc. The Ka peak is more attenuated by the plastic than the Kb peak.

So there is probably a doped zinc oxide in there to produce the fluorescence.
Attachments
TritiumZink.png
Tritium x-ray spectrum
TritiumZink.png (64.09 KiB) Viewed 3236 times
Pieter Kuiper, Växjö (Sweden)
Course lab: 3 mCi neutron source; five 3" NaI(Tl) detectors, CdZnTe detector (Amptek); lead bricks, two GDM 20

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