Determining the Probability of a Nuclear Fusion Reaction: Solve Here!

jim mcjimbers
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Homework Statement


In a particular nuclear reaction, a neutron moving at 3.6×105ms−1 has a 70% chance of initiating a nuclear fusion reaction. Which of the following options is a possible probability of a neutron moving at 2.2×105ms−1 initiating the same nuclear reaction?

I wouldn't be asking this if I really didn't know where to start. I don't even know which formula to use or how to begin solving this. Any help would be greatly appreciated, thanks!
 
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Where are the options?
Are there any reactions where you know if the cross-section is higher or lower for higher/lower speeds?
 
mfb said:
Where are the options?
Are there any reactions where you know if the cross-section is higher or lower for higher/lower speeds?

Yeah, the options are
A) 70%
B) 0%
C) 82%
D) 56%
 

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