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Spin light of electron in dense neutrino fluxes

An electron motion in a dense neutrino flux is investigated. The Dirac equation exact solutions for the electron energy and wave function in this external environment are obtained. On this basis we predict the existence of an electromagnetic radiation that can be emitted by electrons in dense neutrino fluxes. We term this phenomenon "the spin light of electron in dense neutrino flux" ($SLe_ν$). The main properties of the $SLe_ν$ are studied. We argue that the $SLe_ν$ in dense neutrino fluxes should have important consequences in astrophysics and for supernovae processes in particular.