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Physics · L5 · Stellar Nucleosynthesis Pathway by Stellar Mass and Element

How hydrogen fusion mechanism and heavy-element formation depend on stellar mass and the position relative to iron.

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⭐ Star fuses hydrogenStellar mass vs~1.3 solar masses?pp chain dominates(T⁴ scaling)CNO cycle dominates(T¹⁵–T²⁰ scaling)Fusion continues up toiron-56 (peak binding energy)Heavier than iron?s-process:slow neutron capturer-process:rapid neutron captureBelowAboveLow neutron fluxExtreme neutron flux (mergers, supernovae)

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