Re: [Phys-l] Gamma-Gamma Coincidence

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

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
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> Brian W
>
> Bernard Cleyet wrote:
> > My being corrected predates yours.  About 1962 and possible in the  
> > fifties when I attended a nuclear physics lab.
> >
> > I made a point of telling the students "doing" the Fe-57 Mössbauer  
> > lab. that it was a nuclear transition, and, therefore, even tho it  
> > was of lower energy than the vast number of X-rays they'd  
> > encounter, a gamma.
> >
> > bc
>
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Ludwik Kowalski
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