Re: human-human K-40 dose- Reduction due to shielding of

[RADPROJECT@aol.com]

In a message dated 12/8/99 7:36:24 PM Eastern Standard Time, 
daniel.j.strom@pnl.gov writes:

<< 2nd floor water bed, ca. 25 cm thick: ~ 8. uR/h
 2nd floor water bed with person lying next to ion chamber: ~ 7.5 uR/h
 2nd floor water bed with persons lying on either side of ion chamber: ~ 7.0 
uR/h
 
 K-40 is irrelevant; shielding of terrestrial radiation by lots of water is. 
>>
====
This interesting set of measurements also seems to indicate that a person 
lying next to a HPIC shields more radiation from background [ -0.5 uR/h less 
exposure] than contributed by K-40 flux from the person, and that two people 
on either side of the detector shield even more [ -1.0 uR/hr] than they 
contribute due to the larger solid angle of background flux shielded by two 
person.

Stewart Farber
Public Health Sciences
radproject@aol.com
[802] 496-3356
************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html