Re: A Puzzler

[sandy_perle@email.fpl.com]

     Appears to me to be two sources that "simulate" In-113m and Tc-99m. 
     They equate to the energy spectra, but are made from a longer 
     half-life material. Tc-99m (6.04 hrs) and In-113m (99.8 mins) have 
     very short half-lives.
     
     Sandy Perle
     Supervisor Health Physics
     Florida Power and Light Company
     Nuclear Division
     
     (407) 694-4219 Office
     (407) 694-3706 Fax
     
     sandy_perle@email.fpl.com
     
     HomePage: http://www.lookup.com/homepages/54398/home.html


______________________________ Reply Separator _________________________________
Subject: A Puzzler
Author:  radsafe@romulus.ehs.uiuc.edu at Internet-Mail
Date:    2/6/96 12:09 PM


Everyone:

I recently got a sealed-source inventory from a lab.  Two of the sources on
the list contained nuclides unfamiliar to me:  "Sim In-113m" and "Sim
Tc-99m".  These were made by NEN in the early to mid 1970's.  A.D.  Nominal
activities (to three digits) and calibration dates are given, too.

The puzzle is: what nuclide, or nuclides, was (were) REALLY present in these
sources (when new)?  And in what proportion relative to the nominal activities?

Albert Lee Vest           The Ohio State University
Health Physicist    Room 103 1314 Kinnear Road Bldg
(614)292-1284                     1314 Kinnear Road
avest@magnus.acs.ohio-state.edu   Columbus OH 43212
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