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Introduction to Nuclear reactions

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For positive Q values, energy is released (exothermic)<br />

Fission<br />

Fusion<br />

n + 235 U --> 2n + 93 Rb + 141 Cs<br />

Q = 181 MeV<br />

3 H(d,n) 4 He<br />

Q = 17.6 MeV<br />

For negative Q values, reaction threshold = -Q (endothermic)<br />

Pickup<br />

(n,2n)<br />

208 Pb(p,d) 207 Pb<br />

Threshold = 5.17 MeV<br />

179<br />

Hf(n,2n) 180 Hf<br />

Threshold = 6.09 MeV

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