Dissecting Reactor Antineutrino Flux Calculations

Sonzogni, A. A.; McCutchan, E. A.; Hayes, A. C.

doi:10.1103/PhysRevLett.119.112501

Title: Dissecting Reactor Antineutrino Flux Calculations

Abstract

Current predictions for the antineutrino yield and spectra from a nuclear reactor rely on the experimental electron spectra from ²³⁵ U , ²³⁹ Pu , ²⁴¹ Pu and a numerical method to convert these aggregate electron spectra into their corresponding antineutrino ones. In our present work we investigate quantitatively some of the basic assumptions and approximations used in the conversion method, studying first the compatibility between two recent approaches for calculating electron and antineutrino spectra. We then explore different possibilities for the disagreement between the measured Daya Bay and the Huber-Mueller antineutrino spectra, including the ²³⁸ U contribution as well as the effective charge and the allowed shape assumption used in the conversion method. Here, we observe that including a shape correction of about + 6 % MeV ^{- 1} in conversion calculations can better describe the Daya Bay spectrum. Because of a lack of experimental data, this correction cannot be ruled out, concluding that in order to confirm the existence of the reactor neutrino anomaly, or even quantify it, precisely measured electron spectra for about 50 relevant fission products are needed. With the advent of new rare ion facilities, the measurement of shape factors for these nuclides, for manymore »« less

Authors:

Sonzogni, A. A. ^[1]; McCutchan, E. A. ^[1]; Hayes, A. C. ^[2]

Brookhaven National Lab. (BNL), Upton, NY (United States). National Nuclear Data Center
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Fri Sep 15 00:00:00 EDT 2017

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1389254

Alternate Identifier(s):: OSTI ID: 1390660

Report Number(s):: BNL-114289-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO

Grant/Contract Number:: SC0012704; AC02-98CH10886

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 119; Journal Issue: 11; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Sonzogni, A. A., McCutchan, E. A., and Hayes, A. C. Dissecting Reactor Antineutrino Flux Calculations.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevLett.119.112501.

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                    Sonzogni, A. A., McCutchan, E. A., & Hayes, A. C. Dissecting Reactor Antineutrino Flux Calculations.  United States.  https://doi.org/10.1103/PhysRevLett.119.112501

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                    Sonzogni, A. A., McCutchan, E. A., and Hayes, A. C. Fri .  
"Dissecting Reactor Antineutrino Flux Calculations".  United States.  https://doi.org/10.1103/PhysRevLett.119.112501.  https://www.osti.gov/servlets/purl/1389254.

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@article{osti_1389254,

  title        = {Dissecting Reactor Antineutrino Flux Calculations},

  author       = {Sonzogni, A. A. and McCutchan, E. A. and Hayes, A. C.},

  abstractNote = {Current predictions for the antineutrino yield and spectra from a nuclear reactor rely on the experimental electron spectra from 235 U , 239 Pu , 241 Pu and a numerical method to convert these aggregate electron spectra into their corresponding antineutrino ones. In our present work we investigate quantitatively some of the basic assumptions and approximations used in the conversion method, studying first the compatibility between two recent approaches for calculating electron and antineutrino spectra. We then explore different possibilities for the disagreement between the measured Daya Bay and the Huber-Mueller antineutrino spectra, including the 238 U contribution as well as the effective charge and the allowed shape assumption used in the conversion method. Here, we observe that including a shape correction of about + 6 % MeV - 1 in conversion calculations can better describe the Daya Bay spectrum. Because of a lack of experimental data, this correction cannot be ruled out, concluding that in order to confirm the existence of the reactor neutrino anomaly, or even quantify it, precisely measured electron spectra for about 50 relevant fission products are needed. With the advent of new rare ion facilities, the measurement of shape factors for these nuclides, for many of which precise beta intensity data from TAGS experiments already exist, would be highly desirable.},

  doi          = {10.1103/PhysRevLett.119.112501},

  journal      = {Physical Review Letters},

  number       = 11,

  volume       = 119,

  place        = {United States},

  year         = {Fri Sep 15 00:00:00 EDT 2017},

  month        = {Fri Sep 15 00:00:00 EDT 2017}

}

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Works referencing / citing this record:

First Search for Short-Baseline Neutrino Oscillations at HFIR with PROSPECT
text, January 2018

Unknown, (:Unkn)
My University
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Impact of Fission Neutron Energies on Reactor Antineutrino Spectra
text, January 2018

Littlejohn, B. R.; Conant, A.; Dwyer, D. A.
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First search for short-baseline neutrino oscillations at HFIR with PROSPECT
text, January 2018

Ashenfelter, J.; Balantekin, A. B.; Baldenegro, C.
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First-forbidden transitions in the reactor anomaly
text, January 2019

Hayen, Leendert; Kostensalo, Joel; Severijns, Nathal
arXiv
DOI: 10.48550/arxiv.1908.08302

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Title: Dissecting Reactor Antineutrino Flux Calculations

Abstract

Citation Formats

Pr�ziseQ ? -Wert-Messungen mit einem Intrinsic-Germanium Detektor an leichten, neutronenreichen Spaltprodukten journal, March 1980

Precise quasielastic neutrino/nucleon cross-section journal, July 2003

Determination of antineutrino spectra from nuclear reactors journal, August 2011

Background radiation measurements at high power research reactors journal, January 2016

Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay journal, June 2017

Total Absorption Spectroscopy Study of Rb 92 Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape journal, September 2015

Radiative correction to the ν ¯ e ( ν e ) spectrum in β decay journal, July 2011

Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment journal, May 2016

Determination of the antineutrino spectrum from 235U thermal neutron fission products up to 9.5 MeV journal, October 1985

Nuclear structure insights into reactor antineutrino spectra journal, January 2015

Indication of Reactor ν ¯ e Disappearance in the Double Chooz Experiment journal, March 2012

Effects of Fission Yield Data in the Calculation of Antineutrino Spectra for U 235 ( n , fission ) at Thermal and Fast Neutron Energies journal, April 2016

General Properties of the Electromagnetic Corrections to the Beta Decay of a Physical Nucleon journal, December 1967

Spectral Structure of Electron Antineutrinos from Nuclear Reactors journal, January 2015

ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data journal, December 2011

Decays of the Three Top Contributors to the Reactor ν ¯ e High-Energy Spectrum, Rb 92 , Y 96 gs , and Cs 142 , Studied with Total Absorption Spectroscopy journal, August 2016

Effect of first-forbidden decays on the shape of neutrino spectra journal, February 2015

Beta and gama spectra of short-lived fission products journal, July 1990

Antineutrino spectra from 241Pu and 239Pu thermal neutron fission products journal, February 1989

Evaluation of beta-decay journal, May 1990

Conversion of electron spectrum associated with fission into the antineutrino spectrum journal, August 2007

Experimental beta-spectra from 239Pu and 235U thermal neutron fission products and their correlated antineutrino spectra journal, December 1982

Neutron Capture and the Antineutrino Yield from Nuclear Reactors journal, March 2016

Comparison of fast neutron rates for the NEOS experiment journal, December 2016

Reactor antineutrino spectra and their application to antineutrino-induced reactions. II journal, October 1981

New Antineutrino Energy Spectra Predictions from the Summation of Beta Decay Branches of the Fission Products journal, November 2012

Possible origins and implications of the shoulder in reactor neutrino spectra journal, August 2015

NEOS Data and the Origin of the 5 MeV Bump in the Reactor Antineutrino Spectrum journal, January 2017

Reactor Decay Heat in Pu 239 : Solving the γ Discrepancy in the 4–3000-s Cooling Period journal, November 2010

Online monitoring of the Osiris reactor with the Nucifer neutrino detector journal, June 2016

Reliability of usual assumptions in the calculation of β and ν spectra journal, May 2015

Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay journal, February 2016

Improved predictions of reactor antineutrino spectra journal, May 2011

Reactor antineutrino anomaly journal, April 2011

Systematic Uncertainties in the Analysis of the Reactor Neutrino Anomaly journal, May 2014

Measurement of β−-decay intensity distributions of several fission-product isotopes using a total absorption γ-ray spectrometer journal, May 1997

Experimental Determination of the Antineutrino Spectrum of the Fission Products of U 238 journal, March 2014

SOX: Short distance neutrino Oscillations with BoreXino journal, August 2013

First Search for Short-Baseline Neutrino Oscillations at HFIR with PROSPECT text, January 2018

Impact of Fission Neutron Energies on Reactor Antineutrino Spectra text, January 2018

First search for short-baseline neutrino oscillations at HFIR with PROSPECT text, January 2018

First-forbidden transitions in the reactor anomaly text, January 2019

Pr�ziseQ ? -Wert-Messungen mit einem Intrinsic-Germanium Detektor an leichten, neutronenreichen Spaltprodukten
journal, March 1980

Precise quasielastic neutrino/nucleon cross-section
journal, July 2003

Determination of antineutrino spectra from nuclear reactors
journal, August 2011

Background radiation measurements at high power research reactors
journal, January 2016

Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay
journal, June 2017

Total Absorption Spectroscopy Study of ${}^{92}{Rb}$ Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape
journal, September 2015

Radiative correction to the ${\bar{ν}}_{e} (ν_{e})$ spectrum in $β$ decay
journal, July 2011

Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment
journal, May 2016

Determination of the antineutrino spectrum from 235U thermal neutron fission products up to 9.5 MeV
journal, October 1985

Nuclear structure insights into reactor antineutrino spectra
journal, January 2015

Indication of Reactor ${\bar{ν}}_{e}$ Disappearance in the Double Chooz Experiment
journal, March 2012

Effects of Fission Yield Data in the Calculation of Antineutrino Spectra for ${}^{235}U (n, fission)$ at Thermal and Fast Neutron Energies
journal, April 2016

General Properties of the Electromagnetic Corrections to the Beta Decay of a Physical Nucleon
journal, December 1967

Spectral Structure of Electron Antineutrinos from Nuclear Reactors
journal, January 2015

ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data
journal, December 2011

Decays of the Three Top Contributors to the Reactor ${\bar{ν}}_{e}$ High-Energy Spectrum, ${}^{92}{Rb}$ , ${}^{96 gs}Y$ , and ${}^{142}{Cs}$ , Studied with Total Absorption Spectroscopy
journal, August 2016

Effect of first-forbidden decays on the shape of neutrino spectra
journal, February 2015

Beta and gama spectra of short-lived fission products
journal, July 1990

Antineutrino spectra from 241Pu and 239Pu thermal neutron fission products
journal, February 1989

Evaluation of beta-decay
journal, May 1990

Conversion of electron spectrum associated with fission into the antineutrino spectrum
journal, August 2007

Experimental beta-spectra from 239Pu and 235U thermal neutron fission products and their correlated antineutrino spectra
journal, December 1982

Neutron Capture and the Antineutrino Yield from Nuclear Reactors
journal, March 2016

Comparison of fast neutron rates for the NEOS experiment
journal, December 2016

Reactor antineutrino spectra and their application to antineutrino-induced reactions. II
journal, October 1981

New Antineutrino Energy Spectra Predictions from the Summation of Beta Decay Branches of the Fission Products
journal, November 2012

Possible origins and implications of the shoulder in reactor neutrino spectra
journal, August 2015

NEOS Data and the Origin of the 5 MeV Bump in the Reactor Antineutrino Spectrum
journal, January 2017

Reactor Decay Heat in ${}^{239}{Pu}$ : Solving the $γ$ Discrepancy in the 4–3000-s Cooling Period
journal, November 2010

Online monitoring of the Osiris reactor with the Nucifer neutrino detector
journal, June 2016

Reliability of usual assumptions in the calculation of $β$ and $ν$ spectra
journal, May 2015

Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay
journal, February 2016

Improved predictions of reactor antineutrino spectra
journal, May 2011

Reactor antineutrino anomaly
journal, April 2011

Systematic Uncertainties in the Analysis of the Reactor Neutrino Anomaly
journal, May 2014

Measurement of β−-decay intensity distributions of several fission-product isotopes using a total absorption γ-ray spectrometer
journal, May 1997

Experimental Determination of the Antineutrino Spectrum of the Fission Products of ${}^{238}U$
journal, March 2014

SOX: Short distance neutrino Oscillations with BoreXino
journal, August 2013

First Search for Short-Baseline Neutrino Oscillations at HFIR with PROSPECT
text, January 2018

Impact of Fission Neutron Energies on Reactor Antineutrino Spectra
text, January 2018

First search for short-baseline neutrino oscillations at HFIR with PROSPECT
text, January 2018

First-forbidden transitions in the reactor anomaly
text, January 2019