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Title: Further investigation of the “reactor anomaly”

The effect of a more realistic and extensive inclusion of first forbidden beta decay into the determination of the reactor neutrino flux is investigated. Forbidden decays make up approximately 30% of all fission product decays so their possible impact on the neutrino flux should not be neglected. Because of an incomplete knowledge of the requisite nuclear structure it is not possible to incorporate the forbidden decays in an exact fashion thus a variety of scenarios are investigated. It appears that including first forbidden decays measurably modifies the anti-neutrino spectrum, and the uncertainty on the neutrino flux should be expanded beyond 4%.
Authors:
; ;  [1] ;  [2]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)
  2. AECL, Chalk River Laboratories, Chalk River, Ontario KOJ 1 JO (Canada)
Publication Date:
OSTI Identifier:
22490644
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1666; Journal Issue: 1; Conference: Neutrino 2014: 26. international conference on neutrino physics and astrophysics, Boston, MA (United States), 2-7 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; APPROXIMATIONS; BETA DECAY; ELECTRON ANTINEUTRINOS; ENERGY SPECTRA; FISSION PRODUCTS; FORBIDDEN TRANSITIONS; NUCLEAR STRUCTURE; RADIATION FLUX