muon

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muon

A scientist observes a muon track in a cloud chamber.

Definition

Noun: 1. An unstable elementary particle: A muon is a fundamental subatomic particle. It is similar to an electron but has a much greater mass—approximately 207 times the mass of an electron. It carries a negative electric charge and is unstable, meaning it spontaneously decays into other particles after a very short lifetime.

Examples of Usage
  • Noun:
    • Cosmic rays from space produce muons when they collide with atoms in the upper atmosphere.
    • The detector was designed to identify and track the path of a high-energy muon.
    • Scientists study muon decay to test the fundamental laws of particle physics.
Advanced Usage
  • "Muon neutrino": A type of neutrino (a nearly massless, neutral particle) that is associated with the muon during certain particle interactions and decay processes.
  • "Muon catalysis": A hypothetical process in nuclear fusion where a muon, due to its greater mass, could replace an electron in a molecule and potentially allow atomic nuclei to fuse at lower temperatures.
Variants and Related Words
  • Muonic (adj): Relating to or characteristic of a muon.
    • The researcher studied the muonic properties of the atom.
  • Antimuon (n): The antiparticle of the muon; it has a positive electric charge but is otherwise identical.
Synonyms
  • Negative muon: A more specific term emphasizing its electric charge.
  • μ⁻ (pronounced "mu minus"): The standard physics notation for this particle.
Related Terms and Concepts
  • Lepton: The family of elementary particles to which the muon belongs. Other leptons include the electron, the tau particle, and their associated neutrinos.
  • Half-life: The time required for half of a quantity of unstable particles, like muons, to decay. The muon has a half-life of about 2.2 microseconds.
  • Decay: The process by which an unstable particle transforms into other, more stable particles. A muon decays into an electron, a muon neutrino, and an electron antineutrino.
muon

A scientist observes a muon track in a cloud chamber.

Noun
  1. an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino

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