[NewCandle] further adventures of pixie 23

[Horace Heffner]

On Nov 18, 2009, at 7:15 AM, Nick Reiter wrote:

> Yesterday, I took one of the rolls, got a measurement of about  
> 10,000cpm near the open turn end, then put it in a bell jar and  
> pumped on it for about a half hour.  Vented, lifted the bell as  
> quickly as I could, then re-checked the roll end.  Same reading -  
> no change.
>
> Therefore, I would guess its not due to radon entrapment - woulda  
> thought that would change it a little at least if ine outgassed the  
> roll with a pump.
>
> nr

I think you need an analysis of the radiation coming from the foil, a  
gamma spectrum, neutron spectrum, and other counts. I would be  
willing to email around to see if someone is interested in an  
analysis if you want.

If you want to stick with a do it yourself approach then counting  
with more layers of foil for particle discrimination might be good  -  
to see what the decline curve looks like by number of sheets.  Might  
be interesting to see what a contact film exposure would look like.   
Then there is always the old faithful CR-39.  Just throwing ideas  
into the air. I'm sure you have considered these things.

Best regards,

Horace Heffner
http://www.mtaonline.net/~hheffner/