Further investigation of the “reactor anomaly”

Journal Article · Wed Jul 15 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4915562· OSTI ID:22490644

Jungman, Gerard ^[1]; Jonkmans, G. ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)
2. AECL, Chalk River Laboratories, Chalk River, Ontario KOJ 1 JO (Canada)

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%.

• OSTI ID: 22490644
• Journal Information: AIP Conference Proceedings, Vol. 1666, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
BETA DECAY
ELECTRON ANTINEUTRINOS
ENERGY SPECTRA
FISSION PRODUCTS
FORBIDDEN TRANSITIONS
NUCLEAR STRUCTURE
RADIATION FLUX