| inverse
beta
decay (CC = charged current) |
fission
(NC = neutral current) |
elastic
scattering (ES = electron scattering) (identical to the SK experiment) |
|
neutrino reactions |
ne + d --> p + p + e- [nmt + d --> p + p + m-/t- cant happen] |
ni + d --> ni + p + n [i stands for any flavor of n: e or m or t ] |
comes in 2 varieties: ni + e- --> ni + e- ne + e- --> e- + ne (but with a 6x greater probability than above) |
threshold energy |
1.4 Mev |
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 g ray |
e- Cerenkov radiation (directed) |
| what's
being measured |
only the ne flux |
the
total n flux |
mostly ne flux with
some ni
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) |
capture rate |
fne
= 1.76 + 0.11 (x 106 ne/cm2/s) |
fni = 5.09 + 0.11 | fni
= 2.39 + 0.23 = fne + (fnm + fnt)/7 [ fni = 2.30 + 0.03 (SK data) ] |