Polyethylene naphthalate as scintillator

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Richard Hester
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Polyethylene naphthalate as scintillator

Post by Richard Hester »

Polyethylene napthalate (PEN) has been cited as a natural scintillator material, needing no fluorescent additives. I've been wanting to try it out, but so far have not been able to locate a source of the virgin resin or a fabricated rod of virgin material. One supplier has rod stock, but it's horribly expensive and black, to boot. One Chinese supplier has virgin granules, but a minimum buy quantity of 3,000 pounds - that's so not happening...
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Richard Hull
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Re: Polyethylene naphthalate as scintillator

Post by Richard Hull »

I wonder how gamma efficient is it, say, compared to NaI? Still, it would be cool to have some to try out. Pitch black is another non-starter.

Richard Hull
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Richard Hester
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Re: Polyethylene naphthalate as scintillator

Post by Richard Hester »

It's probably similar to other plastic scintillators re gamma discrimination, so I wouldn't get my hopes up.
Richard Hester
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Re: Polyethylene naphthalate as scintillator

Post by Richard Hester »

Here's a presentation on PEN used as scintillator, also mentions PET, which might need a wavelength converter to mesh with the usual PMT.

https://agenda.linearcollider.org/event ... llator.pdf
Richard Hester
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Re: Polyethylene naphthalate as scintillator

Post by Richard Hester »

A thought - I work for a company that deals in ICs, so we have a bunch of plastic rails around for carrying the parts - one of the rails at my desk shows what appears to be bulk fluorescence when exposed to daylight - could it be molded from PEN?
Alex Aitken
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Re: Polyethylene naphthalate as scintillator

Post by Alex Aitken »

Possible, but fluorescent chemicals are often added to plastics to stop them being degraded by UV.
Richard Hester
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Re: Polyethylene naphthalate as scintillator

Post by Richard Hester »

I'm beginning to think that the fluorescent bit may be thee anti-static coating on the plastic, as one end has been degraded by exposure to light and there doesn't seem to be fluorescence of any sort on that end. Sigh...
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