Liquid Scintillation Counting

Scintillation crystals, PMTs, voltage dividers etc...
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Steven Sesselmann
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Liquid Scintillation Counting

Post by Steven Sesselmann » 29 Nov 2018, 20:25

Hi All,

Does anyone here have experience with Liquid scintillation counting?

https://wiki.uio.no/mn/safe/nukwik/inde ... ntillation

Looks simple enough and should work with PRA, just not sure about how to rig up the PMT's. Would the scintillation liquid and sample be in direct contact with the PMT's or is it normally in a separate glass tube?

I have never seen one in the flesh.

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

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brehwens
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Re: Liquid Scintillation Counting

Post by brehwens » 26 Jan 2019, 04:31

A late reply...

The sample is mixed in with the scintillation fluid, in a "standard" scintillation vial that is opaque. The PMTs are not in contact with the sample.

I don't really know what kind of "resolution" one can get with these kinds of detectors. My experience is only of gross counting in the lab, when labelling cells with radionuclides, or to analyze swabs.
Karl Brehwens
Eskilstuna, Sweden.

Setup: 5 cm lead castle, 2mm copper lining. Gamma Spectacular Pro 2002, Sound Blaster Live! 5.1,
Primary detector: Scionix refurbished 2x2" NaI(Tl) well detector, 7.5% @ 662 keV

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Steven Sesselmann
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Location: Sydney
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Re: Liquid Scintillation Counting

Post by Steven Sesselmann » 26 Jan 2019, 09:45

Thanks Karl,

Wouldn't it be better if one had some kind of coupling liquid between the PMT and the vial?

I'm thinking in terms of silicone oil or something like that, into which one could plunge the whole vial.

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

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