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Chapter 11: Q62E (page 520)
Calculate the net amount of energy released in the deuterium-tritium reaction,.
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What does the semiemperical binding energy formula predict forthe mass of a carbon- 12 atom? Comment on your answer.
The semi empirical binding energy formula predicts the binding energies of neon-20, iron- 56, and uranium-238 within about 1\%. Make a table whose rows are the three isotopes, whose first four columns are numerical values of the four tennis in the formula, whose next four columns are each of these terms divided byA, and whose final column is the sum of the preceding four. Discuss in some detail what the table reveals.
(a) To release 100 MW of power, approximately how many uranium fissions must occur every second?
(b) How many kilograms of U-235 would have to fission in 1 year?
The total kinetic energy carried by the products of the spontaneous fission of plutonium 鈥� 240 is typically about 180 MeV. Use this to argue there that reduction in Coulomb repulsion is the major impulse behind the process. Assume for simplicity that the two fragment nuclei are of equal Z.
Certain nuclei with half-lives between days and a few years are found in nature in small abundances that do not change at all over many, many years. How is this possible? (Hint: Natural uranium and thorium have very long half lives.)
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