MAJORANA NEUTRINOS AND GRAVITATIONAL OSCILLATION

We analyze the possibility of encountering resonant transitions of hig h-energy Majorana neutrinos produced in active galactic nuclei. We con sider gravitational, electromagnetic, and matter effects and show that the latter are ignorable. Resonant oscillations due to the gravitatio nal interactions are shown to occur at energies in the PeV range for m agnetic moments in the 10(-17) eta(B) range. Coherent precession will dominate for larger magnetic moments. The regions in parameter space w here gravitational resonant transitions occur are obtained.