Re: [Phys-l] Gamma-Gamma Coincidence

[Brian Whatcott <betwys1@sbcglobal.net>]

Talking of misconceptions - I notice I referred to an outreach effort 
for high schools
as emanating from Lawrence Livermore.    Outreach is probably the last 
thing on their
minds - they do nuclear warhead design. The lab in question was 
Lawrence Berkeley.

Brian W

ludwik kowalski wrote:
> On Mar 29, 2010, at 7:15 AM, Brian Whatcott wrote:
>
>   
> > I see that Serway & Faughn (5th) shows a frequency overlap between
> > Gammas and Xrays in one place,
> > but notes a separation of the two in another passage.    Generally, It
> > refers to gamma ray photons.
> >     
>
> It was said, long time ago, that alpha rays were the least penetrating  
> while gamma rays were the most penetrating nuclear radiations. The so- 
> called "beryllium radiation," was believed to be "unusual gamma rays"  
> because it was highly penetrating. Chadwick identified that radiation  
> as neutrons.
>
> Ludwik
> = = = = = =
>
>