[NewCandle] now here's a curious thing

[Nick Reiter]

Hi Jones, Keith, and Horace,

Thanks for jumping in here...

The Geiger counter window (mica only) was not moved, after I set the bucket up.  I didn't want to chance losing my spot, and thought that for at least starting out, I stay with a single axis or line of sight.  so no, I didn't move the detector around.

That being said, though, GM detector was / is 50mm from the outside wall of the bucket, pointing directly at the bucket, about midway up.

Thus as related to the rolls, the window is pointing at the sides of the rolls, not the ends, through about 5 to 6 cm of free solution.  Being as the top of the solution is about 2cm above the roll tops, the window axis would intercept the length of a roll about 5 cm down from the top end.

So whatever occurred as the rolls wetted themselves was being seen from that vantage point.

Horace, thanks as always for the rapid nuclear perspective...  Ah, if only I had a photon counter!  

n



> Where was the monitor place relative to the axis of the
> rolls when you got
> the high count?
> 
> Is there a variation now, in counts from moving the monitor
> to different
> positions (above below etc)? Did you check for "geometry
> preference"
> initially?
> 
> There is a good chance that if you were measuring from
> above - initially,
> then- when the Al was placed in the solution, which had
> been stored as a
> stable liquid - that any slight chemical reaction would
> cause the heavy
> gaseous "daughters" - radon, xexon etc - to rise out of the
> solution and
> impinge or get closer to the meter, giving the higher
> reading. The daughter
> decay gases are millions of time more radioactive per atom,
> so the closer
> they can aggregate to the meter - the higher you reading
> will appear from
> them alone.
> 
> Jones
> 
> 
> 
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