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Re: Response of RS111 and TLDs to cosmic rays (Was: Dose Rates vs. A
Miro,
Perhaps you can provide additional information?
(1) What type if algorithm, or, elemental responses did you use to
determine the exposure from the TLDs?
(2) If an algorithm was used, what path did the algorithm follow to
determine the exposure?
(3) What type of filtration was over the elements you did use?
I agree with your comment regarding the ratio of RS111 and TLDs.
My experience has been that the TLDs derive excellent correlation
to expected exposure when used as an environmental dosimeter.
The 0.75 to 0.85 seems significantly lower than I would expect.
Thanks...
> 2) TLD cosmic ray response.
>
> The TLDs will respond to the cosmic rays. We have exposed various TLDs
> (LiF, CaF2, CaSO4:Dy, CaSO4:Tm, AlP glass and MgSiO4) at different
> elevations. The components of TLD response were analysed against the
> response of the RS111. We established that the cosmic ray readings of the
> TLDs were approximately from 0.75 to 0.85 of the RS111 cosmic rays response.
>
> Yet, interestingly, the environmental TLDs readings are often expressed as
> the external gamma doses and do not subtract/correct for the cosmic ray
> response.
----------------------------------------------------------------------------------------
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
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ICN Worldwide Dosimetry Website: http://www.dosimetry.com
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