1 answer

Using the half-lives for 238U and 235U, the natural abundance of each isotope, and knowing the...

Question:

Using the half-lives for 238U and 235U, the natural abundance of each isotope, and knowing the density of uranium metal is 19.2 g/cm3, calculate the total decay rate (disintegrations per second) of uranium atoms in a solid sphere, 10 cm in diameter. Both 238U and 235U decay by alpha emission. The alpha particle energies are approximately 4.3 MeV and 4.7 MeV, respectfully. There is additional energy released in photons (gammas) and subsequent decay of daughter products. Ignoring all that, using only the primary alpha particle energies, calculate the heat generated in the sphere of uranium in watts.


Answers

3 o mass a solid Sphene chame U23 8 and 0.7s% U235 Mass U38 n he Sphene mm23 243m C.095 l x 9.3 212 233 u235n he sphene, Mass23 5 aw R AN whene, Samplehen 2 七! in 239 , K2382 33 oU A3 9 33 84 515 R158 心1-23 x , 3 dia (n tegnat mg/ Second 268 Deca Rate 235 2 Total ae Rade 255 L35 N 235 R9353 13 013it Re, the deea*)几ate and Edun tae en erg勹emItted Pen se and - 43x 10 ev Apha pantale em A 3 energ勹 ernu Hed pen Seema Hent g

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