Nuclear reactor fissile isotopes antineutrino spectra

TL;DR

This paper presents a detailed measurement and reconstruction of the standard antineutrino spectrum from nuclear reactors based on positron spectra obtained in a neutrino exploration experiment, enabling improved data analysis for various fuel compositions.

Contribution

It introduces a novel method to extract partial spectra from positron data, enhancing the accuracy of reactor antineutrino spectrum modeling for different fuel types.

Findings

Reconstructed the standard reactor antineutrino spectrum.

Developed a method to extract partial spectra for various fuel compositions.

Provided data useful for neutrino experiments at reactors.

Abstract

Positron spectrum from inverse beta decay reaction on proton was measured in 1988-1990 as a result of neutrino exploration experiment. The measured spectrum has the largest statistics and lowest energy threshold between other neutrino experiments made that time at nuclear reactors. On base of the positron spectrum the standard antineutrino spectrum for typical reactor fuel composition was restored. In presented analysis the partial spectra forming this standard spectrum were extracted using specific method. They could be used for neutrino experiments data analysis made at any fuel composition of reactor core.