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Question: 6 a find the threshold energy for the following reaction...

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6. (a) Find the threshold energy for the following reaction Li+p-HeHe (10 marks) SMES3201 (b) Why is the fusion reaction p+p-He is not possible to occur in the solar fusion process? Give an alternative reaction that is possible and explain why (20 marks) (c) Find the Coulomb barrier for the following reactions (i) Be+p B+y (i) N+p-C+He (30 marks) (30 marks) (o) When nuclei reach A-60 and above, fusion reactions are not energetically (10 marks) (d) Find the effective energy, E, for the reactions in (c) favoured. What is the primary mechanism for A-60 nucleosynthesis?

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