[ RadSafe ] Infinite Thickness of KCl

[Wasiolek, Maryla]

Erik,

You can use MicroShield software with infinite slab geometry.  The simple exponential formula won't quite work because it does not account for buildup and the fact that gammas are generated at various thicknesses throughout the source.

Maryla Wasiolek
Sandia National Labs

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Nielsen.Erik at epamail.epa.gov
Sent: Tuesday, August 30, 2011 10:50 AM
To: radsafe at health.phys.iit.edu
Cc: liste de distribution pour les RADIOCHIMISTEs
Subject: [ RadSafe ] Infinite Thickness of KCl

I am trying to determine the infinite thickness of the 1460 keV gamma 
emission (10.5% abundance) of a planar source of KCl (416 pCi/g) and a 
density of 1.98 g/cc.

In other words, what is the thickness of a KCl planar source where any 
additional thickness does not increase the surface dose rate?

I have scoured my references but have not located the appropriate formula 
for calculating this value.

I would appreciate any references or suggestions for an appropriate 
calculation.

Erik C. Nielsen
USEPA, National Air and Radiation Environmental Laboratory
540 South Morris Ave.
Montgomery, AL 36115
Phone 334-270-3475
Fax 334-270-3454

"Those who do not read are no better off than those who cannot"
_______________________________________________
You are currently subscribed to the RadSafe mailing list

Before posting a message to RadSafe be sure to have read and understood the RadSafe rules. These can be found at: http://health.phys.iit.edu/radsaferules.html

For information on how to subscribe or unsubscribe and other settings visit: http://health.phys.iit.edu