Re: Peak elimination

[glandry@canberra.com]

Some generic items I consider (in no particular order) when trying to identify unknown peaks in gamma ray spectra:

1.	Consider environmental sources, such as K-40, Annihilation, and series decay products (Uranium series, Actinium series, Thorium series)

2.	Consider Single and Double escape peaks for all lines > 1.022 MeV (including those above your spectral display range [if applicable])

3.	Consider results of coincidence and random summing.

4.	Consider minor lines for identified nuclides that may not be in the library you are using.

5.	Consider daughter products.

6.	Consider characteristic X-rays associated with un-layered shielding materials.

7.	If applicable, consider reaction products.

8.	There are also excellent resources to perform energy line searches at:  http://www.nndc.bnl.gov/nndc/nudat/radform.html



These are the items I recall at the moment.


Best regards,


Greg Landry

Canberra Industries, Inc.

"Hart, Diana" <Diana.Hart@EXELONCORP.COM>@list.vanderbilt.edu on 04/08/2003 03:45:49 PM

Please respond to "Hart, Diana" <Diana.Hart@EXELONCORP.COM>

Sent by: owner-radsafe@list.vanderbilt.edu

To: "Radsafe@List. Edu (E-mail)" <radsafe@list.vanderbilt.edu>
cc:
Subject: Peak elimination


Hello Radsafers,

I am looking for criteria that is used to eliminate peaks
from gamma specs (e.g. air sample results indicating what you believe to be
false peaks)?

Your help is appreciated.

Diana Hart
Health Physicist
Limerick Generating Station
Diana.hart@exeloncorp.com



************************************************************************
This e-mail and any of its attachments may contain Exelon Corporation
proprietary information, which is privileged, confidential, or subject
to copyright belonging to the Exelon Corporation family of Companies.
This e-mail is intended solely for the use of the individual or entity
to which it is addressed.  If you are not the intended recipient of this
e-mail, you are hereby notified that any dissemination, distribution,
copying, or action taken in relation to the contents of and attachments
to this e-mail is strictly prohibited and may be unlawful.  If you have
received this e-mail in error, please notify the sender immediately and
permanently delete the original and any copy of this e-mail and any
printout. Thank You.
************************************************************************

************************************************************************
You are currently subscribed to the Radsafe mailing list. To unsubscribe,
send an e-mail to Majordomo@list.vanderbilt.edu  Put the text "unsubscribe
radsafe" (no quote marks) in the body of the e-mail, with no subject line.
You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/