[ RadSafe ] Watch out, you're being watched

[alstonchris at netscape.net]

John







The NRC's definition of "fissile material" is any material fissionable by thermal neutrons.  The three primary fissile materials are U-233, U-235, Pu-239, again by its definition.







Cheers



cja







-----Original Message-----



From: John R Johnson 



Mike 



  I thought a "nuclear weapon" contained U-235 and/or Pu-239, not "fissile   material". These isotopes only emit low energy photons and will not be   detected with a "gamma detector". 



John 

  John R Johnson, PhD 

CEO, IDIAS, Inc.