Interpretation of deuterium production in nanoplasmonic fusion experiments

Determine whether deuterium detected in nanorod-seeded polymer targets is produced by plasmonically enhanced nuclear reactions or by chemical, photochemical, or plasma-chemical processes.

Background

The paper discusses spectroscopic observations of deuterium in irradiated polymer samples containing resonant gold nanorods. The NAPLIFE collaboration attributes the signal either to the weak-interaction proton–proton reaction or to other nuclear processes induced by accelerated protons, but the expected nuclear rate would need substantial enhancement. Because non-nuclear explanations have not been excluded, the observation is presented as suggestive rather than conclusive evidence of fusion.

References

However, the interpretation remains open: On one hand the expected rate of nuclear reactions would need to be greatly enhanced; on another the alternative chemical, photochemical, or plasma-chemistry pathways cannot yet be entirely excluded.

— Science Of Nuclear Fusion: Insights and Ideas  (2609.01366 - Rafelski et al., 1 Sep 2026) in Section 4, subsection “Laser plasmonic resonance,” subsection “Nuclear fusion signatures,” paragraph “Deuterium production”