KamLAND-Experiment and Soliton-Like Nuclear Georeactor

We give an alternative description of the new data produced in the KamLAND experiment, assuming the existence of a natural nuclear reactor on the boundary of the liquid and solid phases of the Earth’s core. Analyzing the uncertainty of antineutrino spectrum of georeactor origin, we show that the theoretical (which takes into account the soliton-like nuclear georeactor with power about 20 TW) reactor antineutrino spectrum describes with good accuracy the new experimental KamLAND-data. At the same time the parameters of mixing calculated within the framework of georeactor hypothesis are substantially closer to the data of solar flux SNO-experiment then the parameters of mixing obtained in KamLAND-experiment.

💡 Research Summary

The paper proposes an alternative interpretation of the most recent KamLAND antineutrino data by invoking a natural, soliton‑like nuclear fission reactor (“georeactor”) situated at the interface between the liquid outer core and the solid inner core of the Earth. The authors argue that under the extreme pressure‑temperature conditions of this boundary, a localized region enriched in fissile material (U‑235, U‑238, Pu‑239, Pu‑241) could achieve a self‑sustaining, quasi‑steady‑state chain reaction that delivers roughly 20 TW of thermal power. They borrow the term “soliton‑like” from nonlinear wave physics to describe a stable, self‑confined plasma‑like zone in which neutron production, heat generation, and material transport balance each other, allowing the reactor to persist over geological timescales.

To substantiate the hypothesis, the authors construct a set of coupled differential equations that describe neutron kinetics (including the neutron reproduction factor η), heat transport (conduction and convection), and material diffusion within the core boundary layer. Numerical simulations suggest that, for plausible core compositions and temperatures, η can exceed the critical value needed for a sustained reaction, yielding a power output in the 15–25 TW range. The paper acknowledges that direct experimental data on nuclear reactions at core pressures are lacking, and therefore the model’s sensitivity to core viscosity, thermal conductivity, and fissile concentration is explored via Monte‑Carlo sampling.

The central observational test is the antineutrino energy spectrum measured by KamLAND. The authors compute the antineutrino flux from the proposed georeactor by summing the spectra of the four principal fissile isotopes, each weighted by its fission fraction. They propagate uncertainties in the fission fractions, the emitted spectra, and the oscillation parameters through a Monte‑Carlo framework, producing a 1σ–2σ envelope for the total expected spectrum (geoneutrinos from radioactive decay plus the georeactor contribution). When this composite spectrum is compared to the KamLAND data, the χ² statistic improves markedly relative to the standard model that includes only radioactive decay sources (U, Th, K). In particular, the high‑energy tail (>3 MeV) of the observed spectrum, which is under‑predicted by the conventional model, is well reproduced by the added georeactor component.

A further consequence of the revised flux model is a shift in the best‑fit neutrino oscillation parameters. By performing a joint fit of the KamLAND spectrum with the georeactor contribution, the authors obtain a solar mixing angle θ₁₂ ≈ 33.5° and a mass‑splitting Δm²₁₂ ≈ 7.5 × 10⁻⁵ eV². These values are notably closer to those derived from the SNO solar‑neutrino measurements (θ₁₂ ≈ 33°, Δm²₁₂ ≈ 7.4 × 10⁻⁵ eV²) than the parameters reported by the KamLAND collaboration when the georeactor is omitted (θ₁₂ ≈ 34.5°, Δm²₁₂ ≈ 7.6 × 10⁻⁵ eV²). The authors argue that the additional high‑energy antineutrinos from the georeactor effectively “pull” the fit toward the solar‑neutrino solution, reducing the tension between reactor‑based and solar‑based measurements.

Beyond the spectral fit, the paper discusses broader geophysical implications. A 20 TW internal heat source would account for nearly half of the Earth’s total heat flow (~44 TW) inferred from surface heat flux measurements. If such a source exists, it would influence mantle convection patterns, the geodynamo, and the long‑term thermal evolution of the planet. The authors suggest that seismic tomography, geomagnetic secular variation studies, and high‑precision heat‑flow surveys could provide indirect constraints on the presence of a deep‑seated fission reactor.

The authors are careful to outline the experimental and observational steps required to validate their hypothesis. First, laboratory studies of fission cross‑sections and neutron multiplication at multi‑megabar pressures are needed to confirm that the required η can be achieved in core‑like materials. Second, next‑generation liquid‑scintillator detectors such as JUNO, SNO+, and Hyper‑Kamiokande will have the statistical power and energy resolution to isolate the high‑energy antineutrino component and to distinguish a georeactor spectrum from the conventional geoneutrino background. Third, a coordinated geophysical program that integrates seismic, magnetic, and thermal data could test whether an additional 20 TW heat source is compatible with existing Earth‑model constraints.

In summary, the paper presents a bold reinterpretation of KamLAND data that posits a soliton‑like nuclear georeactor delivering ~20 TW of power at the core‑mantle boundary. By incorporating the resulting antineutrino flux, the authors achieve a better fit to the observed spectrum and obtain neutrino mixing parameters that align more closely with solar‑neutrino experiments. While the model is internally consistent and offers an intriguing resolution to certain data tensions, it rests on speculative geophysical conditions that lack direct empirical support. Consequently, the hypothesis remains provisional, and its acceptance will depend on forthcoming high‑precision antineutrino measurements and multidisciplinary investigations into Earth’s deep interior.