Measurement of Reactor Antineutrino Flux and Spectrum at RENO

Abstract

The RENO experiment reports measured flux and energy spectrum of reactor electron antineutrinos\,(${\overline{\nu }}_e$) from the six reactors at Hanbit Nuclear Power Plant. The measurements use 966\,094\,(116\,111)\,${\overline{\nu }}_e$ candidate events with a background fraction of 2.39\%\,(5.13\%), acquired in the near\,(far) detector, from August 2011 to March 2020. The inverse beta decay (IBD) yield is measured as (5.852$\pm$0.124$)\times 10^{-43}$\,cm${}^2$/fission, corresponding to 0.941\,$\pm$ 0.019 of the prediction by the Huber and Mueller (HM) model. A reactor ${\overline{\nu }}_e$ spectrum is obtained by unfolding a measured IBD prompt spectrum. The obtained neutrino spectrum shows a clear excess around 6\,MeV relative to the HM prediction. The obtained reactor ${\overline{\nu }}_e$ spectrum will be useful for understanding unknown neutrino properties and reactor models. The observed discrepancies suggest the next round of precision measurements and modification of the current reactor ${\overline{\nu }}_e$ models.

References in corpus (6)

• The Reactor Antineutrino Anomaly
• Sterile neutrino search at NEOS Experiment
• Updated Summation Model: An Improved Agreement with the Daya Bay Antineutrino Fluxes
• Improved Short-Baseline Neutrino Oscillation Search and Energy Spectrum Measurement with the PROSPECT Experiment at HFIR
• Improved Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay
• First antineutrino energy spectrum from ${}^{235}$U fissions with the STEREO detector at ILL

Cited by in corpus (8)

• Search for sterile neutrino oscillation using RENO and NEOS data
• Reactor antineutrino flux and anomaly
• Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay
• Comprehensive Measurement of the Reactor Antineutrino Spectrum and Flux at Daya Bay
• Long term remote reactor power and fuel composition monitoring using antineutrinos
• Towards a Sub-percent Precision Measurement of ${\sin }^2{\theta }_{13}$ with Reactor Antineutrinos
• Results of STEREO and PROSPECT, and status of sterile neutrino searches
• Water-based Quantum Dots Liquid Scintillator for Particle Physics