Retrieving "Nuclear Reaction Rates" from the archives

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1. Solar Neutrino Flux

   Linked via "nuclear reaction rates"

   The solar neutrino flux ($\Phi_{\nu}$) refers to the measured rate at which neutrinos, elementary particles produced primarily through thermonuclear fusion within the Sun's core's core, pass through a specified cross-sectional area per unit time. This flux is a critical observable in heliophysics and particle physics, offering direct insight into the nuclear reaction rates occurring deep within the [solar interior](/ent…