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Author: Subject: Am241 beads
Somerset
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[*] posted on 18-3-2017 at 12:34
Am241 beads


Having several of our these and running through my gamma spectrometry kit, I now want to do something else with them.
1) Spinthariscope
2) source for XRF

Any other interesting suggestions for them please.

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Subverted
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[*] posted on 20-3-2017 at 22:29


Cloud chamber? Im currently trying to work out a fully sealed design for one of those.

Maybe its time for you to build a neutron detection setup? (And then a fast neutron source from Am241+Be.)

Build an alpha spectrometer?

Lots of options for things to do...just dont eat them!
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phlogiston
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[*] posted on 21-3-2017 at 03:51


A direct charging generator would be cool and I don’t remember every having seen one amateur scientist-built.

Also, this:
https://www.youtube.com/watch?v=WCOmPcldqo4




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MrHomeScientist
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[*] posted on 21-3-2017 at 05:43


That actually sounds pretty simple to build, at least for a demonstration. Here's a quote from Wikipedia:

Quote:
English physicist H.G.J. Moseley constructed the first of these. Moseley’s apparatus consisted of a glass globe silvered on the inside with a radium emitter mounted on the tip of a wire at the center. The charged particles from the radium created a flow of electricity as they moved quickly from the radium to the inside surface of the sphere. As late as 1945 the Moseley model guided other efforts to build experimental batteries generating electricity from the emissions of radioactive elements.
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phlogiston
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[*] posted on 21-3-2017 at 14:51


Measuring the current to establish that the device is working is probably a greater challenge.

A quick calculation: typical Am241 bead from a smoke detector contains 37 kBq according to wikipedia.
37E3 * 2e = 5.93E-15 A
So about 6 femtoampere.

The energy of the alpha particles is about 5.4 MeV, so theoretically maximal voltage of about 2.7 MV.
electrical energy output 2.7E6*6E-15 = 16 nW.

[Edited on 21-3-2017 by phlogiston]




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[*] posted on 23-3-2017 at 12:07


Quote: Originally posted by Subverted  
Cloud chamber? Im currently trying to work out a fully sealed design for one of those.

Maybe its time for you to build a neutron detection setup? (And then a fast neutron source from Am241+Be.)

Build an alpha spectrometer?

Lots of options for things to do...just dont eat them!


I have a NE technology alpha beta scintillation counter and a feed out to theremino MCA, which I have tried a Am241 pellet Spectra.

I thought alpha spec generally in a vacuum?
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[*] posted on 26-3-2017 at 13:10


Quote: Originally posted by Somerset  

I have a NE technology alpha beta scintillation counter and a feed out to theremino MCA, which I have tried a Am241 pellet Spectra.

I thought alpha spec generally in a vacuum?

Yes, as far as I know alpha spectrometry needs to be conducted in a vacuum.
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