We thought we knew how the universe forged elements heavier than iron—until the data stopped adding up. In this episode, we sit down with experimental physicist Mathis Wiedeking from Berkeley Lab to discuss the i-process (intermediate neutron capture), a newly identified third mechanism of stellar nucleosynthesis.Discover why the traditional "slow" and "rapid" processes couldn't explain recent astronomical anomalies and how the i-process fills the gap. Wiedeking breaks down the complex nuclear physics experiments required to model these unstable reactions and explains why understanding the hearts of stars is crucial for advancing medical isotopes and nuclear technology here on Earth.

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