[ RadSafe ] TLD Sensitivity

Sandy Perle sandyfl at earthlink.net
Wed Apr 26 18:19:26 CDT 2006

On 25 Apr 2006 at 17:04, Marvin M. Turkanis wrote:

> Is there a basis for a difference in sensitivity of whole body and wrist TLDs to X-rays from the security systems for checked airline luggage?

Your question is confusing. Similar TLD material, be it Lithium 
Fluoride (Li-100 or Li-700 for example), Lithium Borate, etc., is the 
same, whether it's in a whole body or an extremity dosimeter. The 
only difference is that the algorithm will be different, based on 
which depth dose you're measuring; i.e., 1 cm., 0.3 cm., or 0.007 cm. 
The phantom used for calibration is also different. But the 
sensitivity is not going to be a significant variable, if all else is 
the same.

As mentioned by others, the exposure to a badge, no matter what type 
of badge, is significantly higher in a checked bag X-ray unit as 
compared to a carry-on bag X-ray unit. This has nothing to do with TL 
material sensitivity.

Sandy Perle
Senior Vice President, Technical Operations
Global Dosimetry Solutions, Inc.
2652 McGaw Avenue
Irvine, CA 92614 

Tel: (949) 296-2306 / (888) 437-1714  Extension 2306
Fax:(949) 296-1144

E-Mail: sperle at dosimetry.com
E-Mail: sandyfl at earthlink.net 

Global Dosimetry Website: http://www.dosimetry.com/ 
Personal Website: http://sandy-travels.com/ 

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