[ RadSafe ] F-18 Detections

[Bernard Cohen]

Aro, Jon wrote:

>  A post was written indicating the positron will interact with exterior of the detector before it is able to enter the chamber.
>

    ---This is not true. Positrons can be detected by GM counters just 
as ordinary electrons, assuming in both cases they have enough energy to 
pass thru the window -- 100 KeV would ordinarily be sufficient

>  Thus, all of your detections will be the 511 keV photons and not the positrons themselves.  If someone has a reference for this information I would be very appreciative. 
>
>Thanks in advance,
>
>Jon Aro
>The Ottawa Hospital
>
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