Physics – Nuclear Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dnp..f406c&link_type=abstract
American Physical Society, Division of Nuclear Physics Meeting, October 28-31, 1998 Santa Fe, New Mexico, abstract #F4.06
Physics
Nuclear Physics
Scientific paper
Borexino is a new solar neutrino detector under construction in the Gran Sasso national laboratory in Italy. It will contain 300 tons of liquid scintillator in an unsegmented detector. As such, it is also an interesting detector for supernova neutrinos, with high efficiency and a low energy threshold. We calculated the expected neutrino signal in Borexino from a typical Type II supernova at a distance of 10 kpc. A burst of around 80 events would appear in Borexino within a time interval of about 10 s. Most of these events come from the reaction channel: barνe + p arrow e^+ + n. In a liquid scintillator, one can also study charged-current and neutral-current neutrino interactions on ^12C, not possible in the large water Čerenkov detectors. Borexino can clearly distinguish between neutral-current excitation: ^12C(ν,ν')^12C(1^+,1) (15.11 MeV) and the charged-current reactions: ^12C(ν_e,e^-)^12N and ^12C(barν_e,e^+)^12B, via their distinctive event signatures. The ratio of the charged-current to neutral-current neutrino event rates and their time profiles, with respect to each other, can provide a handle on supernova and non-Standard-Model neutrino physics (mass and oscillations).
Cadonati Laura
Calaprice Frank P.
Chen Mu-Chun
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