Marathon Fusion

Creating the world's most valuable materials with transmutation

Since 2023, we've been developing foundational capabilities to unlock a new modality in isotope production.

Engineer working on the reactor

Isotope separation facilities generate enriched precursor material

Nature provides the material, but not at the right purity. By enriching feedstock, we greatly enhance production yields while eliminating unwanted byproducts.

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Precursor material is engineered into a blanket, and irradiated by neutrons

Fusion produces high energy neutrons, enabling nuclear reactions that no other facility can pursue. Neutrons can transmute 1000x as much material per particle compared to protons from particle accelerators, and can be made at much higher rates.

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Rare isotopes are extracted from the blanket and delivered to customers

Only a fraction of precursor material gets transmuted on each pass. The rest has to be separated out chemically, and can then be recycled back into the blanket.

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The same process that generates medical isotopes will fuel fusion power plants.

Step
Fusion energy
Radiopharmaceuticals
Alchemy
Enrich
Natural lithium → lithium-6
Precursor feedstock
Natural mercury → Hg-198
Irradiate
Fusion power plant
Modular micro reactors
Fusion power plant
Extract
Tritium
Medical isotopes
Gold
Why it matters
Sustain plant operations
Payloads for targeted cancer therapy
Economic dividend for fusion energy

R&D Timeline

Enrichment
ModelingDone
Proof of ConceptDone
Sample QualificationDone
Pilot Plant2027
Full-Scale Production2029
Irradiation
ModelingDone
Proof of Concept2026
Sample Qualification2027
Pilot Plant2028
Full-Scale Production2029
Extraction
ModelingDone
Proof of ConceptDone
Sample Qualification2027
Pilot Plant2028
Full-Scale Production2029
Fusion EnergyThe fuel cycle that sustains plant operationAlchemyScalable co-production of gold in fusion power plantsRadiopharmaceuticalsIsotopes for targeted cancer therapy