Direct evidence for collective neutrino oscillations in core-collapse supernovae remains elusive. We show that this quantum phenomenon leaves a footprint on the abundance pattern of proton-rich nuclides in the solar system. Modeling the -process using a progenitor, we map out the dependence of the total yields on the starting radius of the oscillations, self-consistently coupling hydrodynamics and nucleosynthesis. The oscillations boost key -nuclides (, ) and long-lived by up to two orders of magnitude, bringing their abundances into agreement with the observations. The best match is found when oscillations commence within of the proto-neutron star surface, indicating fast collective oscillations.
-process using a 
progenitor, we map out the dependence of the total yields on the starting radius of the oscillations, self-consistently coupling hydrodynamics and nucleosynthesis. The oscillations boost key 
-nuclides (
, 
) and long-lived 
by up to two orders of magnitude, bringing their abundances into agreement with the observations. The best match is found when oscillations commence within 
of the proto-neutron star surface, indicating fast collective oscillations.
