Astronomy and Astrophysics – Astrophysics
Scientific paper
1994-11-24
Phys.Rev.C52:1095-1101,1995
Astronomy and Astrophysics
Astrophysics
postscript file 11 pages + 4 figures compressed and uuencoded we have replaced the previous paper with a uuencoded file (the t
Scientific paper
10.1103/PhysRevC.52.1095
We quantitatively determine the effect and the uncertainty on solar neutrino production arising from the screening process. We present predictions for the solar neutrino fluxes and signals obtained with different screening models available in the literature and by using our stellar evolution code. We explain these numerical results in terms of simple laws relating the screening factors with the neutrino fluxes. Futhermore we explore a wider range of models for screening, obtained from the Mitler model by introducing and varying two phenomenological parameters, taking into account effects not included in the Mitler prescription. Screening implies, with respect to a no-screening case, a central temperat reduction of 0.5%, a 2% (8%) increase of Beryllium (Boron)-neutrino flux and a 2% (12%) increase of the Gallium (Chlorine) signal. We also find that uncertainties due to the screening effect ar at the level of 1% for the predicted Beryllium-neutrino flux and Gallium signal, not exceeding 3% for the Boron-neutrino flux and the Chlorine signal.
Degl'Innocenti Scilla
Fiorentini Gianni
Ricci Barbara
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