Re: Need help with gamma spec spectrum. -Reply -Reply

[Michael S Ford <MFORD@pantex.com>]

Khalid, I don't believe I stated that it was a "common" occurrence, I
only described what I believed **might have been** the cause.  I
don't believe Mr. Wish stated what his detection system was, so your
HPGe assumption may not be correct. I don't know.

As I also implied, and others have stated, that a particular sampling
matrix can through you a few curve balls where things don't appear
as they normally do.

I could be completely wrong about everything!  It's happened
before... yesterday, in fact.  If that is the case here, please feel free to
reduce my advice fees accordingly.  ;-)

Have a great day!
v/r
Michael
mford@pantex.com

>>> Khalid Aleissa wrote on Thu 19 Aug 99  4:52 >>>
Well, it is not common to see multiple peaks covering a 15 keV span
in HpGe detector with the same counting rate. Unless there is a
gamma emitting isotope with very short half life daughters emitting
gamma rays with energies close to that of the parent. I can not recall
one isotope having this characteristics!

Michael S Ford wrote:

> Steven, without seeing the spectrum, what you have described
> appears to be ...

>> <Arsnews%aol.com wrote on Mon 16 Aug 99  12:34 >>>
>
snip....
>
> I am having difficulty identifying a peak on a gamma spec
spectrum.   The peak range is from 470-485 keV and has a peak
shape of a wide plateau vice the normal pointed peak you would
expect....

************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html