Abstract
Precise antineutrino measurements are very sensitive to proper background characterization. We present an improved measurement of the reaction cross section which constitutes significant background for large detectors. We greatly improve the precision and accuracy by utilizing a setup that is sensitive to the neutron energies while making measurements of the excited state transitions via secondary -ray detection. Our results shows a 54% reduction in the background contributions from the state used in the KamLAND analysis.
- Received 15 October 2019
- Revised 7 May 2020
- Accepted 29 May 2020
DOI:https://doi.org/10.1103/PhysRevLett.125.062501
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