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Measuring Changes in the Atmospheric Neutrino Rate Over Gigayear Timescales
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abstract
Measuring the cosmic ray flux over timescales comparable to the age of the solar system, $\sim 4.5\,$Gyr, could provide a new window on the history of the Earth, the solar system, and even our galaxy. We present a technique to indirectly measure the rate of cosmic rays as a function of time using the imprints of atmospheric neutrinos in paleo-detectors, natural minerals which record damage tracks from nuclear recoils. Minerals commonly found on Earth are $\lesssim 1\,$Gyr old, providing the ability to look back across cosmic ray history on timescales of the same order as the age of the solar system. Given a collection of differently aged samples dated with reasonable accuracy, this technique is particularly well-suited to measuring historical changes in the cosmic ray flux at Earth and is broadly applicable in astrophysics and geophysics.
Forward citations
Cited by 2 Pith papers
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Paleodetectors for neutrino signals from diverse Galactic stellar collapses
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Mineral Detection of Neutrinos and Dark Matter 2025 Proceedings
A workshop proceedings presenting 20 status reports on mineral detectors as passive, long-exposure nuclear recoil detectors for dark matter, neutrinos, and cosmic rays.
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