9
The CNO
Cycle
•Gives
way around need for p ®n during the collision
•Still
must happen later – but don’t need to rare events simultaneously
•Trade
off is need for higher energy collisions (T>16
million K)
•Add
p to some nucleus where new one is still “stable”
•Wait
for p ® n
while that nucleus just
“sits around”
•The
net effect is still 4 1H ® 4He
•C just acts like a “catalyst”
From our text: Horizons, by Sees
