What does cross section for fusion means

[PlasmaLord]

The concept cross section what does it really means. Is that the maximum area for a fusion reaction to take place with a certain probability. Like the chans is more than 0,5 for fusion between boron and proton at 1 biljon K in an area less then 1*E-22 cm2. Then of course it must also be one proton and one boron nuclei in that area.

Or am I wrong here. If so help me out.

[Breakable]

Cross section is more probabilistic due to particle-wave duality, but basically yes, the bigger the cross-section the more likely a fusion reaction will occur considering there is enough energy to overcome the coulomb barrier.

[PlasmaLord]

Cross section is more probabilistic due to particle-wave duality, but basically yes, the bigger the cross-section the more likely a fusion reaction will occur considering there is enough energy to overcome the coulomb barrier.

What I want to know is what and how you calculate it. If cross section is 10 exp -20 what does it means. An very simple calculated example is enough for me to understand I think.

[Francisl]

I don’t know about simple calculations but here is a database of reactions: https://www-nds.iaea.org/exfor/endf.htm

[Author]

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