Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pht....45h..17s&link_type=abstract
Physics Today (ISSN 0031-9228), vol. 45, no. 8, pt. 1, Aug. 1992, p. 17-20.
Astronomy and Astrophysics
Astrophysics
2
Chlorine, Gallium, Nuclear Astrophysics, Solar Neutrinos, Energy Spectra, International Cooperation, Nuclear Fusion, Radioactive Decay, Stellar Models
Scientific paper
The results of the Gallex solar neutrino experiment are examined and compared to theoretical predictions as well as the data from the Soviet-American Gallium Experiment. Attention is given to the instruments' sensitivities to 'pp' neutrinos which result from the proton-proton fusion reaction dominating the sun's energy production. The Gallex results are not unambiguous but give a neutrino capture rate of 63 +/- 16 percent of that predicted by the standard solar model. By reconciling the data from the gallium and chlorine experiments some solar parameters have to be adjusted from the values associated with the standard solar model. Also discussed are the experiment's implications for reexamining the accepted masses of the three solar neutrino types. The Gallex results are examined critically in the light of background contamination by such substances as Ge-68.
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