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4hv.org :: Forums :: General Science and Electronics
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Geoneutrino detection

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Conundrum
Wed Dec 25 2013, 07:29PM Print
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi all.
Just found a fascinating paper suggesting that geoneutrinos from 40K could be detected using cadmium, or possibly copper 63 (63Cu)

Link2

If so then a detector could be made using isotopically enriched Cu waste from PCB manufacture.

Sound feasible, as the relative abundance is 0.6%

-A
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Bored Chemist
Sat Jan 04 2014, 05:28PM
Bored Chemist Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
The abundance of 63Cu isn't 0.6% it is about 0.6 i.e. 60%. There's not much call for isotopic enrichment.
Can you link to the paper?
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Conundrum
Sun Jan 05 2014, 09:59AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
I think the idea here is that 63Cu isn't the best candidate, but cadmium can indeed be enriched in this way using a gas centrifuge.
In fact all those "useless" NiCad batteries if reprocessed could allow a neutrino detector to be made and the excess Cd recycled as solar cells smile

-A
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Andy
Sun Jan 05 2014, 06:23PM
Andy Registered Member #4266 Joined: Fri Dec 16 2011, 03:15AM
Location:
Posts: 874
Just throwing this out there, but would a neutrino have a mass of 7.9E-32kg, or doesn't it have any mass at all?
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Ash Small
Sun Jan 05 2014, 07:59PM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Andy wrote ...

Just throwing this out there, but would a neutrino have a mass of 7.9E-32kg, or doesn't it have any mass at all?

They are generally mass-less, however, recent developments suggest that, when they pass through a medium other than a vacuum they 'aquire' mass by interacting with the medium, and their velocity is also 'medium dependant', as is the speed of light.
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Andy
Sat Jan 11 2014, 04:04AM
Andy Registered Member #4266 Joined: Fri Dec 16 2011, 03:15AM
Location:
Posts: 874
Hi Conundrum

I think Cadmium would work, GaSrCd , being used with scintillators, thoughts?
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Conundrum
Sat Jan 11 2014, 08:00AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Could do, certainly worth a try.

There's certainly a lot of it around thanks to all those perfectly good NiCads being trashed.
In fact one idea for anecdotal reports of neutrino sensitivity in CdS screened sensors was just this.
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