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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 » of which precise beta intensity data from TAGS experiments already exist, would be highly desirable.« less

Authors:
 [1];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). National Nuclear Data Center
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
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:
Journal Article: 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.
Sonzogni, A. A., McCutchan, E. A., & Hayes, A. C. Dissecting Reactor Antineutrino Flux Calculations. United States. doi:10.1103/PhysRevLett.119.112501.
Sonzogni, A. A., McCutchan, E. A., and Hayes, A. C. Fri . "Dissecting Reactor Antineutrino Flux Calculations". United States. doi:10.1103/PhysRevLett.119.112501. https://www.osti.gov/servlets/purl/1389254.
@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},
issn = {0031-9007},
number = 11,
volume = 119,
place = {United States},
year = {2017},
month = {9}
}

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