1. Nov 4, 2011 #1

   lonewolf219

   

   Hi, just learning about alpha and beta particles in class this week. What does it mean that the nucleus is unstable in a radioactive isotope? Is this a condition that must be present for nuclear radiation?

    

   lonewolf219, Nov 4, 2011
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3. Nov 4, 2011 #2

   mathman

   

   Science Advisor

   A radioactive isotope (by definition) is one that is unstable. This almost always involves alpha or beta (+ or -) particle output. There is a rare reaction, electron capture, where no particle is emitted.

    

   mathman, Nov 4, 2011

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