Re: Article from 3/2 Christian Science Monitor: "Pardon me,

[steve hand <hand@wam.umd.edu>]

Regarding this response -

"60 keV gammas can be detected with Geiger-Mueller counters."

    - I use a smoke detector with an Am-241 source as one
demonstration that GM detectors sometimes are not the appropriate detector
to use when looking for low energy photons - then I use a NaI and we easily
see the gammas.  I do the same with a simulated I-125 source (I-129,
42 keV) to show the need for NaI vs GM.

      Is this an incorrect demonstration and why doesn't my GM see these gammas ?

Thanks

Steve Hand
Radiation Safety
University of Maryland
hand@wam.umd.edu
 

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