Analysis of reactor-neutrino spectra fully based on gross theory of beta-decay emphasizing the special role of odd-odd FP nuclides
1 Tokyo Institute of Technology, Laboratory for Advanced Nuclear Energy, Ookayama, Meguro-ku, Tokyo, Japan
2 Waseda University, Advanced Research Institute for Science and Engineering, Okubo, Shinjuku-ku, Tokyo, Japan
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Published online: 13 September 2017
We applied the gross theory of β-decay to calculate the reactor antineutrino (νe) spectra emitted from 235,238U and 239,241Pu samples under neutron irradiation by summing up all the contributions from a large number of decaying fission-products (FPs). Considering the special role of the odd(Z)-odd(N) FPs in spectrum-shaping, we utilized the experimentally-known spin-parity of each odd-odd FP through the treatment proposed by Nakata, Tachibana and Yamada. Owing to this treatment, the consistency between calculated and experimental spectra was remarkably improved in a way expected from the nature of the gross theory of β-decay.
© The Authors, published by EDP Sciences, 2017
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