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This article reports the optimized experimental requirements to determine neutrino mass hierarchy using electron antineutrinos ($\bar{\nu}_e$) generated in a nuclear reactor. The features of the neutrino mass hierarchy can be extracted from…

High Energy Physics - Experiment · Physics 2016-01-20 M. Y. Pac

We report a reanalysis of the reactor antineutrino energy spectra based on the new relative measurements of the ratio $R=\!^{e}S_5/^{e}S_9$ between cumulative $\beta$ spectra from $^{235}$U and $^{239}$Pu, performed at a research reactor in…

Nuclear Experiment · Physics 2021-11-03 V. Kopeikin , M. Skorokhvatov , O. Titov

A conceptual experimental method for providing a new measurement of the underlying beta decay spectra from fission products is presented. The goal is to provide additional information related to the prediction of the antineutrino emission…

Nuclear Experiment · Physics 2013-04-16 D. Asner , K. A. Burns , B. Greenfield , M. S. Kos , J. L. Orrell , M. Schram , B. A. VanDevender , D. Wootan

The evolution of the reactor antineutrino spectrum toward equilibrium above the inverse beta-decay threshold during the reactor operating period and the decay of residual antineutrino radiation after reactor shutdown are considered. It is…

High Energy Physics - Phenomenology · Physics 2011-08-11 V. I. Kopeikin , L. A. Mikaelyan , V. V. Sinev

Anti-neutrino emission rates from nuclear reactors are determined from thermal power measurements and fission rate calculations. The uncertainties in these quantities for commercial power plants and their impact on the calculated…

High Energy Physics - Experiment · Physics 2009-11-13 Z. Djurcic , J. A. Detwiler , A. Piepke , V. R. Foster , L. Miller , G. Gratta

A non zero, surprisingly large value of the third mixing angle $\theta_{13}$ has been measured in reactor neutrino experiments. Currently the most precise measurement of $\sin^2 2\theta_{13}$ has been performed by the Daya Bay experiment…

High Energy Physics - Experiment · Physics 2013-02-12 Rupert Leitner

The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor $\overline{\nu}_e$ by comparison of their prompt signal spectra measured in two identical near and far detectors. In the…

High Energy Physics - Experiment · Physics 2016-06-01 RENO Collaboration

Measurements of the decay energy released as a function of time following the thermal neutron induced fission on $^{235}$U and $^{239,241}$Pu were performed in the 1970s at Oak Ridge National Laboratory with the purpose of quantifying…

Nuclear Experiment · Physics 2023-06-05 A. A. Sonzogni , R. J. Lorek , A. Mattera , E. A. McCutchan

The experiment "Neutrino-4" started in 2014 on a model, then it was continued on a full-scale detector, and now, has provided the measurement result on dependence of the flux and spectrum of reactor antineutrinos on the distance of 6 - 12…

We examine uncertainties in the analysis of the reactor neutrino anomaly, wherein it is suggested that only about 94% of the emitted antineutrino flux was detected in short baseline experiments. We find that the form of the corrections that…

Nuclear Theory · Physics 2014-05-28 A. C. Hayes , J. L. Friar , G. T. Garvey , G. Jungman , Guy Jonkmans

Building on earlier studies, we investigate the possibility to determine the type of neutrino mass spectrum (i.e., "the neutrino mass hierarchy") in a high statistics reactor electron antineutrino experiment with a relatively large…

High Energy Physics - Phenomenology · Physics 2011-03-28 Pomita Ghoshal , S. T. Petcov

The reactor antineutrino anomaly might be explained by the oscillation of reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore this hypothesis, the STEREO experiment measures the antineutrino energy spectrum in…

The antineutrino detectors in the Daya Bay reactor neutrino experiment are liquid scintillator detectors designed to detect low energy particles from antineutrino interactions with high efficiency and low backgrounds. Since the antineutrino…

We study the advantages of a second identical detector at a medium baseline reactor neutrino experiment. A major obstruction to the determination of the neutrino mass hierarchy is the detector's unknown nonlinear energy response, which even…

High Energy Physics - Phenomenology · Physics 2014-04-23 Emilio Ciuffoli , Jarah Evslin , Zhimin Wang , Changgen Yang , Xinmin Zhang , Weili Zhong

In a conventional light water reactor loaded with a range of uranium and plutonium-based fuel mixtures, the variation in antineutrino production over the cycle reflects both the initial core fissile inventory and its evolution. Under the…

Nuclear Experiment · Physics 2018-01-17 Adam Bernstein , Nathaniel Bowden , Anna Erickson

Till 2010 we had three unknown parameters of neutrino oscillation: the third mixing angle {\theta}_(13), the sign of the larger mass difference {\Delta}m^(2)_(31) and the CP violating phase {\delta}. Thanks to a number of consistent…

High Energy Physics - Phenomenology · Physics 2015-06-16 D. P. Roy

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)\,$\overline{\nu}_e$…

We perform a phenomenological analysis of neutrino oscillation in a four generation framework introducing an additional sterile neutrino. In such a scenario, more than one pattern is possible that can accommodate three hieararchically…

High Energy Physics - Phenomenology · Physics 2009-08-07 Srubabati Goswami

The current short baseline reactor experiments, Daya Bay and RENO (Double Chooz) have measured (or are capable of measuring) an effective $\Delta m^2$ associated with the atmospheric oscillation scale of 0.5 km/MeV in electron anti-neutrino…

High Energy Physics - Phenomenology · Physics 2016-03-23 Stephen Parke
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