| inverse beta decay (CC = charged current) |
fission (NC = neutral current) |
elastic
scattering (ES = electron scattering) (identical to the SK experiment) |
|
neutrino reactions |
νe + d --> p + p + e- νμ/ντ + d --> p + p + μ-/τ- can't happen] |
νi + d --> νi + p + n [i stands for any flavor of ν: e or μ or |
comes in 2 varieties: νi + e- --> νi + e- νe + e- --> e- + νe (but with a 6x greater probability than above) |
threshold energy |
1.4 Mev for e- production 110 Mev for μ- production 1.8 Gev for τ- production |
2.2 Mev = binding energy of deuterium |
5 Mev or else insignificant Cerenkov radiation over the background |
detection method |
e- Cerenkov radiation (isotropic) |
n
capture by deuterium produces an excited tritium that decays via a 6.25-Mev γ ray |
e- Cerenkov radiation (directed) |
| what's being
measured |
only the νe
flux |
the total ν flux |
mostly νe
flux with some νi flux |
experimental detections (relative to theoretical neutrino flux) |
0.33 + 0.03 |
0.97 + 0.05 |
0.46 + 0.03 (SNO) 0.43 + 0.01 (SK data) |
experimental/theoretical (if electron neutrinos oscillate equally into muon and tauon neutrinos) |
1.0 + 0.1 |
0.97 + 0.05 |
1.0 + 0.0 |
capture rate |
φνe = 1.76 + 0.11 (x 106 νe/cm2/s) |
φνi = 5.09 + 0.11 |
φνi
= 2.39 +
0.23 = φνe + (φνμ +φντ)/7 φ&vu;i = 2.30 + 0.03 (SK data) ] |