Publication Date:
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.
Iris type:
1.1 Articolo in rivista
Keywords:
C-14; Borexino; low background liquid scintillator; neutrino
List of contributors:
Alimonti, G.; Angloher, G.; Arpesella, C.; Balata, M.; Bellini, G.; Benziger, J.; Bonetti, S.; Cadonati, L.; Calaprice, F. P.; Cecchet, G.; Chen, M.; Darnton, N.; DE BARI, Antonio; Deutsch, M.; Elisei, F.; von Feilitzsch, F.; Galbiati, C.; Gatti, F.; Giammarchi, M. G.; Giugni, D.; Goldbrunner, T.; Golubchikov, A.; Goretti, A.; Hagner, T.; Hartmann, F. X.; von Hentig, R.; Heusser, G.; Ianni, A.; Jochum, J.; Johnson, M.; Laubenstein, M.; Lombardi, P.; Magni, S.; Malvezzi, S.; Manno, I.; Manuzio, G.; Masetti, F.; Mazzucato, U.; Meroni, E.; Neff, M.; Nostro, A.; Oberauer, L.; Perotti, Angelo; Preda, A.; Raghavan, R. S.; Ranucci, G.; Resconi, E.; Ruscitti, M.; Scardaoni, R.; Schonert, S.; Smirnov, O.; Tartaglia, R.; Testera, G.; Ullucci, P.; Vogelaar, R. B.; Vitale, S.; Zaimidoroga, O.
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