Physics
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998lpico.957...49v&link_type=abstract
Origin of the Earth and Moon, Proceedings of the Conference held 1-3 December, 1998 in Monterey, California. LPI Contribution N
Physics
Translucence, Solar Neutrinos, Earth Mantle, Particle Mass, Oscillations, Resonance, Electron Density (Concentration), Tomography
Scientific paper
The basic idea of a neutrinos translucence of the Earth has been revived in connection with the solar neutrinos problem. Attempts to interpret a deficit of solar neutrinos measured by neutrinos detectors of Homestake, Kamiokande, and Gallex et al. have drawn attention to the effect of resonant amplification of a neutrino-flavor oscillation in matter (Mikheyev-Smirnov-Wolfenstein effect). The available data present a strong argument in favor of nonzero neutrino rest masses with delta m2 approximately equals 5 x 10-6 -6 x 10-3 eV sq. and a mixing angle of value sin2 theta approximately equals 0.08. We have analyzed data of measurements at Homestake (South Dakota, USA). Unfortunately, the well-known results of Homestake are likely altered by background (atmospheric) secondary cosmic rays. The perspective of the neutrino tomography with the use of rare but high-power fluxes from flashing supernovae stars is briefly discussed. In calculations of regeneration neutrino in the Earth, the PREM is used. We call attention to the connection between the problems of light impurities (O, S, or Si) in the Earth Core, the solar neutrino and the physics of weak interactions. We elaborate here the theory of neutrino-flux variations that allows us to put forward a new way to use the MSW effect for refinement of the composition of light impurities of Fe-Ni in the outer Earth's core. This method is based on the difference in electron density delta Ne approximates 0.15 Ne of alternative compositions (FeO/FeS/FeSi) being discussed in the literature.
Bashkirov Andrei G.
Li T. D. V.
Pechernikova Galina V.
Vityazev Andrei V.
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