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We study the energy released from phase-transition induced collapse ofneutron stars, which results in large amplitude stellar oscillations. To modelthis process we use a Newtonian hydrodynamic code, with a high resolutionshock-capturing scheme. The physical process considered is a sudden phasetransition from normal nuclear matter to a mixed phase of quark and nuclearmatter. We show that both the temperature and the density at the neutrinosphereoscillate with time. However, they are nearly 180 degree out of phase.Consequently, extremely intense, pulsating neutrino/antineutrino and leptonicpair fluxes will be emitted. During this stage several mass ejecta can beejected from the stellar surface by the neutrinos and antineutrinos. Theseejecta can be further accelerated to relativistic speeds by theelectron/positron pairs, created by the neutrino and antineutrino annihilationoutside the stellar surface. We suggest that this process may be a possiblemechanism for short Gamma-Ray Bursts.

Neutrino and Electron-positron Pair Emission from Phase-induced Collapse of Neutron Stars to Quark Stars