Could an energetic neutrino (of any flavor), on passing near an electron, nucleon, or nucleus, be stimulated to emit a neutrino pair (of any flavor)? An example might be an energetic electron-neutrino, passing close to a nucleus, and emitting a muon-neutrino/muon-antineutrino pair., with the original electron-neutrino losing the necessary amount of kinetic energy to create the additional neutrino pair. This reaction wouldn't violate any conservation laws that I know of, as the two new neutrinos would have opposite spin, so that would cancel, opposite lepton number, so that would cancel, and opposite lepton type, so that would cancel. I assume such an interaction would be mediated by a Z-zero, as no charge is involved, assuming it's possible. The inspiration for this idea was that neutrino oscillation is known to be greatly enhanced when neutrinos pass through matter, whether the interior of the sun or solid rock. So, it seemed reasonable that other transformations were possible when neutrinos pass close to massive particles. Additionally, pair production occurs when an energetic gamma ray passes near a nucleus, though, in that case the gamma ray is transmuted into an electron-positron pair. A closer analogy to the hypothetical interaction above is when an energetic electron passes near a nucleus and spits out an electron-positron pair, while the original electron loses the appropriate energy to create the electron-positron pair.