Given the data in Table 18.2 estimate the number of neutrons emitted by spontaneous fission per second
Question:
Given the data in Table 18.2
estimate the number of neutrons emitted by spontaneous fission per second per kilogram of naturally occurring uranium.
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Nucleus Natural Half-life Fraction of decays by spontaneous fission Average number of neutrons per fission Neutrons per year abundance (years) per mole 235 92 238U 92 239 Pu 94 7.8 x 104 1.1 x 108 7.04 x 108 7.0 x 10-11 0.7204% 1.86 99.2742% 4.46 x 10° 5.5 x 10-7 2.07 2.41 x 10 3 x 10-12 2.16 1.1 x 10° 240 pu 94 6.56 x 10 5.7 x 10-8 8.0 x 1012 2.21 2.65 x 10 3.09 x 10-2 3.73 1.8 x 1019
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