From: jimdavis2@earthlink.net   
      
   william mook wrote:   
      
   > Consider that by bombarding Oxygen 18 - which is stable and has   
   > an abundance of 1/5th percent - with a neutron makes it into   
   > Oxygen 19. This is unstable and in a few seconds decays into   
   > Flourine and an ANTI-NEUTRON.   
      
   Are you sure about this, William? Every reference I've checked says   
   that O-19 decays into F-19 (which is stable) via beta-minus decay.   
      
   Jim Davis   
      
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