Beta spectrum modeling for the CeLAND experiment antineutrino source

This Master Thesis dissertation reports on the development of a model for β-decay spectra computation. It is speci cally adapted to spectra predictions for the Ce-Pr source used in the CeLAND experiment. Spectra are modeled using Fermi Theory and taking into account supplementary small e ects, namely the nucleus nite-size e ects, screening e ect by the atomic electrons, nucleus recoil, outer radiative corrections and the so-called weak magnetism e ect. Theoretical uncertainties to the model are estimated. The possibility to predict neutrino spectrum shape is of primary importance for CeLAND preparation, as the experiment aims at measuring neutrino oscillations using notably neutrino spectrum distortion among other things.