In article , jacobnavia
writes:

Le 23/01/2018 22:33, Steve Willner a écrit :
In article ,
Gary Harnagel writes:
The neutrino flux would be red-shifted by z ~ 1100 also,

This ignores the part about the neutrinos having decoupled long
before the photons. One source, which seems to be a textbook by
Daniel Baumann at Cambridge:
http://www.damtp.cam.ac.uk/user/db27...y/Chapter3.pdf
gives a neutrino decoupling redshift of 6E9. That corresponds to an
energy of about 1 Mev and a time about 1 s after the Big Bang.
Cosmological neutrinos should therefore have a kinetic energy today
of about 1/6 meV (i.e., milli-, not mega-). As the OP wrote, that's
very far from detectable.


It depends on your antena's neutrino sensitivity.

I'm no expert here, but the energy of neutrinos in the cosmic neutrino
background have energies orders of magnitude below that needed for the
reactions used in conventional detectors.

Why do neutrinos react with some Chlorate compounds?

Isn't it a consequence of the geometry of the collision?

I'm not sure what you mean here, but even if it were, the energies are
too low.

I'm sure some expert will weigh in on the "direction" stuff.