Measurement of the Ratio of Cumulative Spectra of Beta Particles from $${}^{{235}}$$U and $${}^{{239}}$$Pu Fission Products for Solving Problems of Reactor-Antineutrino Physics
| Autor: | Yu. N. Panin, V. I. Kopeikin, A. A. Sabelnikov |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Nuclear and High Energy Physics Fission products Particle physics 010308 nuclear & particles physics Fission Spectrum (functional analysis) 01 natural sciences Atomic and Molecular Physics and Optics Spectral line 0103 physical sciences Beta particle Production (computer science) 010306 general physics Bar (unit) |
| Zdroj: | Physics of Atomic Nuclei. 84:1-10 |
| ISSN: | 1562-692X 1063-7788 |
| Popis: | The first cycle of measurements of the ratio of cumulative spectra of beta particles originating from the isotopes $${}^{235}$$ U and $${}^{239}$$ Pu undergoing thermal-neutron-induced fission was performed. It is found that the curve obtained from our present measurement of the $${}^{235}$$ U $$/^{239}$$ Pu ratio of beta-particle spectra lies 5 $${\%}$$ lower than the analogous curve following from the measurement of a group from Institute Laue–Langevin (ILL). The present analysis reveals that this is due to an erroneous 5 $${\%}$$ overestimation of the $${}^{235}$$ U beta-particle spectrum measured by the ILL group. As a consequence, the results obtained for the $${}^{235}$$ U $$\bar{{\nu}}_{e}$$ spectrum at the production instant via a reconstruction from the cumulative spectrum of beta particles from $${}^{235}$$ U also turned out to be overestimated by 5 $${\%}$$ . These data explain the effect of the reactor antineutrino anomaly. |
| Databáze: | OpenAIRE |
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