This article reports that antineutrinos might generate unusual isotopes of metals such as molybdenum and ruthenium. Supernovae trigger reactions that forge most of the heavy elements of the universe, but textbook reactions can't explain the emergence of these rare isotopes. After a sun collapses to a neutron star, investigators at the University of Basel in Switzerland suggest that antineutrinos streaming from the neutron star could irradiate protons, turning some into neutrons, which build stable, heavy isotopes.
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