Re: airport explosive detection systems

[joseph guido <jguido@poky.srv.net>]

Jennifer Wilson wrote:
> 
> Hello everyone,
> 
>         I had a question from an employee involving new airport detection
> systems designed to detect explosives.  Apparently these detectors use
> gamma radiation.  The questions put to me were:  How do these detectors
> work?  How do the gamma rays aid in detecting explosives?  Any info on
> these questions would be appreciated!  Thanks.
> 
>                                         Jen Wilson
>                                         R.S.O.
>                                         UNBCI believe that they use a neutron source and look at absorbtion of neutrons withen the package 
(i.e. nitrogen is a relatively strong absorber and is a major constituent of explosives).

joe guido