HW4-8 - 4-4 Nuclear Energetics Chap. 4 7. What is the...

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Unformatted text preview: 4-4 Nuclear Energetics Chap. 4 7. What is the Q-value (in MeV) for eachof the following possible nuclear reactions? Which are exothermic and which are endothermic? 19B+ 'Y 9B + 0 In 5 1 9 IP + 4Be --+ ~Be+ Ip ~Be+ ~H ~Be+ iH ~Li + ~He Solution: Consider the 9Be(p,-r)10Breaction. The Q-value is Q = {M(lH) + M(~Be) -M(rB)} C2 = {1.00782503+ 9.0121821- 10.0129370} (u) x 931.5 (MeV lu) = 6.586 MeV The other reactions are treated similarly. The results are tabulated below. 8. Neutron irradiation of 6Li can produce the following reactions. ~Li + 'Y gLi+An ~n+gLi -~He+ ~p ~He+ ~H ~H + ~He What is the Q-value (in MeV) for eachreaction? Solution: Results are summarized in the table below. July 24, 2002 ...
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