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- W1640346058 abstract "Solar neutrino detection can probe the state of the solar interior. The flux of pp‐neutrinos (from hydrogen fusion: p+p → d+e++νe) is firmly predicted from the solar luminosity, any shortage would indicate restmass‐mediated νe‐disappearance during transit between the solar core and the detector. The expected fluxes of the less abundant but higher energy neutrinos from 8B and 7Be depend more sensitively on the details of the solar model. For them, the observation of a deficit may indicate either incomplete understanding of the stellar interior or new physics through massive neutrinos. The low‐threshold gallium detector operated by the GALLEX collaboration in the Gran Sasso underground laboratory (Italy) is sensitive to pp‐neutrinos. It succeeded in their detection, constituting the first direct observation of hydrogen fusion inside a star. This became possible through single atom detection, constituting the first direct observation of hydrogen fusion inside a star. This became possible through single atom detection in miniaturized proportional counters with background rates <1 count/month. The GALLEX result can accommodate the pp‐neutrinos at full strength. At the same time, it confirms a shortage of the higher energy neutrinos, as seen in the results of the Homestake‐ and Kamiokande experiments. With the present errors GALLEX constitutes a 2.5 problem for 7Be neutrinos within the frame of ‘astrophysical’ solutions. Alternatively, the ‘particle physics’ solution can consistently explain all available solar neutrino results, leading to a most probable mass scale with the muon‐neutrino at approximately 3 meV (milli‐eV). However, since the GALLEX results allows the presence of pp and pep neutrinos at full strength, the latter explanation of the data is not enforced." @default.
- W1640346058 created "2016-06-24" @default.
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- W1640346058 date "1995-01-01" @default.
- W1640346058 modified "2023-09-25" @default.
- W1640346058 title "Analysis of ultra low activities to detect solar neutrinos with the radiochemical GALLEX detector" @default.
- W1640346058 cites W2994915295 @default.
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- W1640346058 doi "https://doi.org/10.1063/1.47603" @default.
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