Track etch on glass

["Robert J. Gunter" <rjgunter@chpconsultants.com>]

Greetings All,



What type of control methodology is used for track etch on glass

dosimetry.  I assume it is similar to that for CR-39 where there are

batch controls that account for the variability between batches to the

point at which you can account for the location on the pane of glass

from where the detector was taken.  Is this so?  



I could see how this would differ in that with using CR-39 for neutrons

you etch off the outer layer to eliminate the radon tracks.  Are the

alpha tracks on glass obscured by high backgrounds?   After all, you can

use CR-39 for radon too, though I am unsure how effective it is at low

levels.



Yours,



Rob



Robert J. Gunter, CHP

CHP Consultants

www.chpconsultants.com

rjgunter@chpconsultants.com

(865) 387-0028 ph

(865) 483-7189 fax

Oak Ridge, TN



**********



I also have a concern about dosimetry. The "track-etch on glass" radon

device seems promising. Note however that it can vary 25% over a single

pane of glass and variability in readings is much greater in houses with

smokers or former smokers. These variabilities become significant when

the

RR at 150 Bq/m^3 is estimated to be 1.14. 

Tom





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