The direct ssion of Uranium 232U in a chain reaction on a power nuclear reactor is as follows: Zggu + (1,11 ) 122m?" + lggxwu second) > 12Xe + 3351' + 23:: + 7y (a = a ham, Q 2 i200 Mel'), produces a total energy of 1:200 MeV. (3). Explain the physical meaning and urgency of the scattering cross section 0 in the above reaction, (ii). If there is a total of 1 gram of Uranium in the fuel, calculate the total value of obtaining energy 0 obtained