Re: Anyone hear of "flawed rad detectors"...

["Sandy Perle" <sandyfl@earthlink.net>]

David provides some excellent information and links. I concur with 
the assumption that there is no significant reason to do anything 
with respect to neutron dosimetry.

TLDs are energy dependent with respect to neutron monitoring. The 
processor needs to know what environment the TLD was worn to a "more 
correct" neutron energy calibration factor. Once this is done, the 
dose determination is very accurate and precise. The TLD is viable 
for neutron energy up to about 5 Mev. After that, there is 
essentially no response.

CR39 is also very good, and, it is energy independent. It is only 
viable from 150 keV up to about 20 MeV. 

As David mentioned, the total contribution of dose attributed to 
neutron dose is extremely small. Therefore, any significant 
investment to improve on an already excellent system, is not a good 
business decision for anyone.

------------------------------------------------------------------------
Sandy Perle					Tel:(714) 545-0100 / (800) 548-5100   				    	
Director, Technical				Extension 2306 				     	
ICN Worldwide Dosimetry Division		Fax:(714) 668-3149 	                   		    
ICN Biomedicals, Inc.				E-Mail: sandyfl@earthlink.net 				                           
ICN Plaza, 3300 Hyland Avenue  		E-Mail: sperle@icnpharm.com          	          
Costa Mesa, CA 92626                                      

Personal Website:  http://www.geocities.com/capecanaveral/1205
ICN Worldwide Dosimetry Website: http://www.dosimetry.com

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