Physics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ncimc...9..488k&link_type=abstract
(Symposium on Underground Physics, 1st, Saint Vincent, Italy, Apr. 25-28, 1985) Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol.
Physics
Absorption Cross Sections, Cosmic Ray Showers, Galactic Cosmic Rays, Gallium Isotopes, Neutrinos, Nuclear Capture, Radiation Counters, Solar Neutrinos, Background Radiation, Boron Isotopes, Elementary Particle Interactions, High Energy Interactions, Radioactive Decay
Scientific paper
Calculations of the neutrino-capture cross sections for Ga-69 and Ga-71 based on a microscopic treatment of the Gamow-Teller matrix elements are presented. A strong enhancement of the cross-section for high-energetic neutrinos is found compared to previous phenomenological estimates. As a consequence the present assumptions on the signal from B-8 neutrinos in Ga-71 have to be revised. A rather large solar-model-dependent background of B-8 neutrinos has to be expected in a gallium solar-neutrino experiment together with the pp signal. This complicates the interpretation of such an experiment, particularly in the case of neutrino oscillations with nonmaximum mixing angle. The calculations yield a larger sensitivity of the gallium detector than assumed previously for Galactic neutrinos.
Grotz K.
Klapdor Hans Volker
Metzinger J.
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