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The CNO Cycle
•Gives way around need for p ®n during the collision
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•Still must happen later – but don’t need to rare events simultaneously
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•Trade off is need for higher energy collisions  (T>16 million K)
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•Add p to some nucleus where new one is still “stable”
•Wait for p ® n while that nucleus just “sits around”
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•The net effect is still   4  1H ®  4He
•C just acts like a “catalyst”
From our text:  Horizons, by Sees