Startup Converts Mercury Into Gold via Plasma Centrifuge
The transmutation process beats a 40-year-old record by 10x, but production remains in the research phase.
Updated on Oct. 22, 2026 in Nuclear
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In September 2026, startup Marathon Fusion demonstrated the conversion of mercury into gold using a plasma centrifuge. This research-stage development relies on high-energy neutrons to trigger nuclear transmutation, exceeding previous production records.
Why it matters
The development explores the practical limits of nuclear transmutation, an area of physics historically sidelined by the high energy costs required to alter elemental structures.
The process uses high-energy neutrons to convert mercury isotopes into gold, outperforming a previous record established roughly 40 years ago by a factor of 10. The startup is now scaling this technology for use in a proposed reactor.
The players
Marathon Fusion
A startup building a fusion reactor in San Francisco and developing plasma centrifuge technologies for isotopic enrichment.
The details
The technology utilizes a plasma centrifuge to enrich specific mercury isotopes, which are then bombarded with high-energy neutrons to facilitate nuclear transmutation—the conversion of one chemical element into another through nuclear reaction. By manipulating the atomic nucleus directly, the system attempts to bypass chemical processing constraints. This specific application represents a laboratory-scale research project currently being adapted for larger fusion infrastructure.
Timeline
1986: Soviet-era isotope enrichment record established.
September 2026: Marathon Fusion demonstrated high-rate alchemy.
October 21, 2026: Marathon Fusion announced the alchemy results.
The Tech Race
The experiment updates a 40-year-old baseline for isotopic enrichment efficiency established by Soviet-era research. It moves the field toward a goal of high-volume transmutation that was previously considered theoretically possible but practically unreachable.
This remains a research-stage project confined to the lab, with no immediate impact on commercial gold markets or consumer assets. San Francisco residents should monitor the startup's progress toward building a functional reactor as the primary indicator of further scale.
The takeaway
While the process demonstrates a technical leap in transmutation, the actual production cost versus market gold prices remains unverified. Investors and scientists should watch for the startup's next reactor milestone to see if the theoretical 5,000-kilogram annual capacity can be achieved in practice.
Further reading
Learn more about the current landscape of Nuclear research and its applications.
Source note: This article includes information reported by U.
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