Gallium solar neutrino experiments: Absorption cross sections, neutrino spectra, and predicted event rates

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.3391· OSTI ID:550625

Bahcall, J N ^[1]

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1. School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)

Neutrino absorption cross sections for {sup 71}Ga are calculated for all solar neutrino sources with standard energy spectra, and for laboratory sources of {sup 51}Cr and {sup 37}Ar; the calculations include, where appropriate, the thermal energy of fusing solar ions and use improved nuclear and atomic data. The ratio, R, of measured (in GALLEX and SAGE) to calculated {sup 51}Cr capture rate is R=0.95{plus_minus}0.07 (expt)+{sub {minus}0.03}{sup +0.04} (theor). 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 also presented for pp and CNO neutrino sources in the appendix. Neutrino fluxes predicted by standard solar models, corrected for diffusion, have been in the range 120 SNU to 141 SNU since 1968. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 550625
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 56; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ABSORPTION
ALPHA REACTIONS
ARGON 37
CHROMIUM 51
COSMIC RAY FLUX
CROSS SECTIONS
DIFFUSION
ENERGY SPECTRA
GALLIUM 71 TARGET
HELIUM 3 TARGET
NEUTRINO REACTIONS
SOLAR NEUTRINOS