Re: Security Screening Technique

[Dimiter Popoff <tgi@cit.bg>]

> .... The one I am 

> familiar, with XRF Corporation's ICS-4000, has a FWHM at Cs137 of 10 keV 

> @ 662 keV  (about 1.5%) and a lower level noise of less than 10 keV.   



That's a good improvement versus NaI (6%, 40 keV). Yet I would not

venture to offer a system capable to automatically recognize patients

from bombs based on that... HPGe is about 8 times better (1.3 keV

and even better at the same line), but even if it were practical

(now it is not because of price and Dewar size/weight), I would argue

that Mark's suggestion was better. 

[ His suggestion was to use the  chirpers - or whatever similar simple

device they have - to locate the source and get an idea of the activity.

If a solution is to beat his idea, it must be capable to check the passants

without them noticing they are checked.]   



Dimiter 



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Dimiter Popoff

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