The C-14/C-12 ratio in 4.8 m(3) of high-purity liquid scintillator was measured at (1.94 +/- 0.09) x 10(-18), the lowest C-14 abundance ever measured. At this level the spectroscopy of low-energy solar neutrinos, in particular a measurement of the Be-7 neutrino flux, will not be obstructed by the C-14 beta decay intrinsic to a liquid scintillator detector. A comprehensive study of the deviation of the shape of the C-14 beta spectrum from the allowed statistical shape reveals consistent results with recent observations and calculations. Possible origins of the C-14 in the liquid scintillator are discussed.
Measurement of the C-14 abundance in a low-background liquid scintillator.
DE BARI, ANTONIO;PEROTTI, ANGELO;
1998
Abstract
The C-14/C-12 ratio in 4.8 m(3) of high-purity liquid scintillator was measured at (1.94 +/- 0.09) x 10(-18), the lowest C-14 abundance ever measured. At this level the spectroscopy of low-energy solar neutrinos, in particular a measurement of the Be-7 neutrino flux, will not be obstructed by the C-14 beta decay intrinsic to a liquid scintillator detector. A comprehensive study of the deviation of the shape of the C-14 beta spectrum from the allowed statistical shape reveals consistent results with recent observations and calculations. Possible origins of the C-14 in the liquid scintillator are discussed.File in questo prodotto:
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