Calculate kinematic threshold energy of proton.

by tritenick
Tags: energy, kinematic, proton, threshold
tritenick is offline
Jan19-10, 12:45 AM
P: 1
1. The problem statement, all variables and given/known data
Given the reactions:
p + 9 Be --> 10B + "gamma"
p + 9 Be --> 9B + 1n
p + 9 Be --> 9Be + 1p
p + 9 Be --> 8Be + 2H
p + 9 Be --> 7Be + 3H
p + 9 Be --> 6Li + 4He

Calculate: a) Q-value
b) kinematic threshold energy of the proton
c)threshold energy of the proton for the reaction
d) minimum kinetic energy of the products

2. Relevant equations 3. The attempt at a solution

Attempt: I have worked out part a) for each. But am not sure what the difference between b & c are? Any ideas? For c) I thought the equation would be:
KE_threshold = -Q*(mb+mB)/(mB+mb+ma)

Thanks for any thoughts!
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