neutrino interactions

I saw article claiming that low energy neutrinos (low is a relative term here--these are nuclear energy level neutrinos) could have large interaction rates in a magnetized plasma. I have to--rather grumpily--admit that I'm having a bit of trouble following the paper and won't have an immediate critique ready. X is true therefore we can assume Y--wait, what? And the coupling constant is proportional to 1/B?

Neutrinos at low energy are tough to spot. I tried to figure a way to use a cold crystal and detect phonons from neutrinos collectively scattering from the array of nuclei (instead of from a single nucleus), but it would have been extremely wavelength specific and since the neutrino wavelength wouldn't match the atomic spacing (it would only be commensurate) the result would have been pretty muddy at best, and likely not much more sensitive than the detectors we already have. Oh well.