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Neutrino-oscillation experiments at the Goesgen nuclear power reactor

Journal Article · · Phys. Rev. D; (United States)
; ; ; ; ; ; ; ; ;

A search for neutrino oscillations has been conducted at the 2800-MW (thermal) nuclear power reactor in Goesgen (Switzerland), providing 5 x 10/sup 20/ electron antineutrinos per second. The energy spectrum of the antineutrinos was measured at three distances, 37.9, 45.9, and 64.7 m, from the reactor core. The detection of the neutrinos is based on the reaction nu-bar/sub e/+p..-->..e/sup +/+n. Roughly 10/sup 4/ antineutrinos were registered at each of the three measuring positions. The measured spectra are analyzed in terms of a two-neutrino oscillation model and the results are represented as exclusion plots for the oscillation parameters ..delta..m/sup 2/ and sin/sup 2/2theta. Two analyses are performed: Analysis A relies exclusively on the data measured at the three different distances; analysis B combines the measured data with additional information, in particular with the reactor antineutrino spectrum as derived from independent ..beta..-spectroscopic measurements. Both analyses show that the data are consistent with the absence of neutrino oscillations, and rule out large regions of parameters (..delta..m/sup 2/,theta). The resulting limits on the oscillation parameters are ..delta..m/sup 2/<0.019 eV/sup 2/ (90% C.L.) for maximum mixing and sin/sup 2/2theta<0.21 (90% C.L.) for ..delta..m/sup 2/>5 eV/sup 2/.

Research Organization:
Physik Department, Technische Universitat Muenchen, D-8046 Garching, Federal Republic of Germany
OSTI ID:
7104483
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 34:9; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTINEUTRINOS
ANTIPARTICLES
BARYONS
BASIC INTERACTIONS
BETA SPECTROSCOPY
CROSS SECTIONS
EIGENSTATES
ELEMENTARY PARTICLES
ENERGY SPECTRA
ENRICHED URANIUM REACTORS
FERMIONS
GOESGEN REACTOR
HADRONS
INTERACTIONS
LEPTON NUMBER
LEPTONS
MASSLESS PARTICLES
NEUTRINO OSCILLATION
NEUTRINOS
NEUTRONS
NUCLEONS
POSITRONS
POWER REACTORS
PWR TYPE REACTORS
REACTORS
SPECTRA
SPECTROSCOPY
THERMAL REACTORS
UNIVERSE
WATER COOLED REACTORS
WATER MODERATED REACTORS
WEAK INTERACTIONS