Inverse Beta Decay in a Nonequilibrium Antineutrino Flux from a Nuclear Reactor
نویسنده
چکیده
The flux and the spectrum of reactor antineutrinos depend not only on the current reactor state, which is specified by the power level and the isotope composition of the nuclear fuel used, but also on the preceding evolution of the fuel. The spectrum of antineutrinos produced in the beta decay of fission products and other radioactive nuclei accumulated in the reactor core begin to evolve toward equilibrium after the start-up of a reactor. After reactor shutdown, the antineutrino radiation diminishes for a long time. In [1, 2], equilibration of the spectrum and the reduction of the soft section of the ν̄e spectrum, where the effects of preceding evolution are pronounced, were analyzed in connection with the problem of searches for the neutrino magnetic moment in experiments studying ν̄e, e − scattering. In this study, we consider the inverse-betadecay process ν̄e + p → n+ e + (1)
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