Gallium solar neutrino experiments

Details Gallium solar neutrino experiments Gallium solar neutrino experiments

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.2601b&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #26.01; Bulletin of the American Astronomical Society, Vol. 29, p.1253

Physics

Scientific paper

Neutrino absorption cross sections for (71Ga) are calculated for all solar neutrino sources with standard energy spectra, and for laboratory sources of (51Cr) and (37Ar) ; the calculations include, where appropriate, the thermal energy of decaying solar ions and use improved nuclear and atomic data. The ratio, R, of measured (in GALLEX and SAGE) to calculated (51Cr) capture rate is R = 0.95 +/- 0.07 (exp) + (+0.04}_{-0.03) (theory). Cross sections are also calculated for specific neutrino energies chosen so that a spline fit determines accurately the event rates in a gallium detector even if new physics changes the energy spectrum of solar neutrinos. Theoretical uncertainties are estimated for cross sections at specific energies and for standard neutrino energy spectra. Standard energy spectra are presented for pp and CNO neutrino sources in the appendices. Neutrino fluxes predicted by standard solar models, and minimal standard electroweak theory, when corrected for diffusion, have been in the range 120 SNU to 141 SNU since 1968. The measured rate is 70.5 +/- 7 SNU.

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