[ RadSafe ] Fwd: [EXTERNAL] Re: Stolen cobalt-60 found in Mexico; curious thi...

[Chris Alston]

*And* much greater abundance (198% versus cesium's 85%, as best I recal).

cja
---------- Forwarded message ----------
From: Doug Aitken <JAitken at slb.com>
Date: Fri, Dec 6, 2013 at 4:55 PM
Subject: Re: [ RadSafe ] [EXTERNAL] Re:  Stolen cobalt-60 found in
Mexico; curious thi...
To: "The International Radiation Protection (Health Physics) Mailing
List" <radsafe at health.phys.iit.edu>


"Quite a bit lower"....
Most "gamma-gamma" borehole density tools use Cs-137 sources of less
than 2 ci (74 GBq).... and "big" neutron sources are AmBe with <20 Ci
(740 GBq).

And remember Co60 is emitting Gamma rays of double the energy of
Cs-137 (1.33 and 1.16 MeV vs 662 keV)

Regards
___________________________________________________________________________________
Doug Aitken
QHSE Advisor, Schlumberger D&M Operations Support