Re: [Phys-l] experimentation 101

[ludwik kowalski <kowalskil@mail.montclair.edu>]

Yes, all obvious things were considered. The mean density, on 37  
experimental surfaces, was the same as on control surface (exposed to  
extremely low background). Exposure times were several days.  
Fortunately, the claim we are trying to either confirm or refute is at  
the level of about 200 tr/cm^2. Therefore, neither our low values nor  
our high values are consistent with the clam.

Regards,

Ludwik
= = = = = = = = =

On Jul 14, 2010, at 6:08 PM, Bernard Cleyet wrote:

> Have you measured the radioactivity of dust?  IIRC, an intro.  
> exercise is to triboelectrically charge an inflated ballon at the  
> beginning of a lab. period and near the end deflate it and measure  
> the activity, which is noticeable.  I measured the activity of a  
> filter I used to clean the air from a window fan.  Very active.
>
> bc
>
> On 2010, Jul 14, , at 13:22, ludwik kowalski wrote:
>
> > That is a tricky issue; on one hand this and on the other hand  
> > that. I am rejecting the outliers, blaming a possibility of  
> > migrating alpha radioactive contamination. My attempts to confirm  
> > this hypothesis were not successful.
> >
> > Ludwik
>
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Ludwik

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