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Re: Cosmic Ray Detector using fluorescent tubes - alpha particle sou   Message List  
Reply | Forward Message #680 of 689 |
Re: [particledetector] Re: Cosmic Ray Detector using fluorescent tubes - alpha particle sources
G'day Robert,

robertatairstream wrote:
> 5) Holding the alpha particle source close increases these pulses and turning
it away decreases.

this sounds a little strange to me, since alphas won't go
thru the glass of the tube. Most likely your source also
produces a good amount of gammas and that is what you see.

Cheers,
Hannes.
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Thu Mar 5, 2009 9:05 am

al_birdie_2000
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Message #680 of 689 |
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You may want to "sacrifice" a regular cheap home-use smoke detector. Many smoke detectors use a small ion chamber as the smoke detecting element. Inside the...
Noel Verbiest
nverbies
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Feb 27, 2009
3:49 am

Thanks Noel, I have no problem hacking apart a smoke detector, don't know why I don't just pop down to the store a get a few :-P in the first place, I'll get...
robertatairstream
robertatairs...
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Feb 27, 2009
7:03 am

I went out on the weekend and bought a smoke detector for only $7AU which has a nice little alloy disk with americium 241 (according the package). It seems to...
robertatairstream
robertatairs...
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Mar 5, 2009
6:50 am

G'day Robert, ... this sounds a little strange to me, since alphas won't go thru the glass of the tube. Most likely your source also produces a good amount of...
Ing. Hannes Mayer
al_birdie_2000
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Mar 5, 2009
9:05 am

That is excellent feedback Hannes, as I was very disappointed that I didn't get the same level reaction in the tube detector as I did with a Geiger counter. As...
robertatairstream
robertatairs...
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Mar 5, 2009
11:10 am

Take your geiger counter to flea markets, yard sales or thrift stores, look for an older alarm clock with a radium dial. My dad's old alarm clock provides a...
n8fgv
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Feb 27, 2009
8:38 pm

Robert, Americanium 241 is a strong alpha emitter and a weak gamma emitter. The glass in your tubes will block the alphas.  Most Geiger counters have tube...
Ronald Fleshman
ronfleshman
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Mar 5, 2009
1:40 pm
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