Muon Beam Catalysed Nuclear Fusion

(1) A beam of negatively charged muons is produced and injected into a mixed fuel of deuterium and tritium, (2) resulting in the creation of many muonic tritium atoms (tµ). As muons are 207 times heavier than electrons, the muon orbits the nucleus at a much closer distance to the nucleus than electrons. Thus, tµ atoms are extremely small. (3) As the tµ atoms have no electric charge, they readily collide with deuterium atoms without being affected by repulsive electrical force. These collisions produce dtµ molecules, which consist of a muon, a deuterium nucleus and a tritium nucleus. (4) Similar to tµ atoms, dtµ molecules are extremely small. When d–t nuclear fusion occurs in these small molecules, large amounts of energy are released, accompanied by the production of α particles (helium nuclei) and neutrons. (5) The muon is freed and recycled in subsequent nuclear fusion reactions. (6) About 1% of the liberated muons, however, become stuck to helium nuclei.Image from NextBigFutureResearchers in Japan are developing a form of Deuterium - Tritium fusion that is catalysed by the injection of a stream of muons. Brian Wang has the details:

Muon-based nuclear fusion is conducted using negative muons. A mixed gas of deuterium and tritium is cooled to temperatures below around −250°C, causing the gas to form a liquid or solid. The injection of a beam of muons (µ) into the medium then generates muonic tritium atoms (tµ), which are similar to hydrogen atoms. As muons are 207 times heavier than electrons, the muon orbits the nucleus at a distance much shorter than that for electrons. Thus, tµ atoms are extremely small, and because the tµ atoms have no charge, they collide with deuterium atoms without being affected by repulsive electrical force. This process produces muonic deuterium–tritium molecules (dtµ), which are also similar to hydrogen atoms, and which have a nucleus consisting of a muon, a deuterium nucleus and a tritium nucleus. Similar to the tµ atom, the dtµ molecule is extremely small, which allows the deuterium and tritium nuclei to come into very close proximity, thus inducing d–t nuclear fusion.

After the occurrence of d–t nuclear fusion, the muon in the dt molecule is liberated and becomes available for the creation of a new dtµ molecule. Thus a chain of nuclear fusions occurs. This reaction is called 'muon-catalyzed nuclear fusion' because the muons act like a catalyst that drives nuclear fusion. _NextBigFuture

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Cross-posted at Al Fin