The first experimentally detected neutrino was actually an anti-neutrino

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

The first experimentally detected neutrino, discovered by Frederick Reines and Clyde Cowan in 1956 using a nuclear reactor, was indeed an electron antineutrino.

The analysis

The claim states that the first experimentally detected neutrino was actually an anti-neutrino. The Cowan-Reines neutrino experiment utilized a nuclear reactor as an intense source of antineutrinos, which were detected via inverse beta decay. Papers [3] and [8] confirm that this historical discovery detected antineutrinos.

Evidence for · 2

Metal-loaded liquid scintillators for neutrino experiments

Recorded source metadata

M. Yeh, Y. Williamson, R. Hahn. Metal-loaded liquid scintillators for neutrino experiments. 2008. https://doi.org/10.1088/1742-6596/136/4/042054

Paper [3] explicitly notes that the early discovery experiment by Reines and Cowan involved antineutrino capture and the delayed neutron-capture signal following antineutrino detection.

Source citation format

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More for · 1

1st Franco–Algerian Workshop on Neutrino Physics

Recorded source metadata

N. Mebarki, J. Mimouni, F. Vanucci, H. Aissaoui. 1st Franco–Algerian Workshop on Neutrino Physics. 2015. https://doi.org/10.1088/1742-6596/593/1/011001

Paper [8] recounts the discovery of the neutrino in the Cowan-Reines experiment, which utilized a nuclear reactor as a source of antineutrinos.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8001 Aug 2026

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