positron
/'pɔzitrɔn/
Definition
- Noun:
- An elementary particle with positive charge: A positron is the antimatter counterpart of the electron, possessing the same mass but a positive electric charge. Its interaction with an electron results in mutual annihilation, producing energy in the form of gamma rays.
Usage Examples
- Noun:
- The experiment detected the emission of a positron from the radioactive nucleus.
- When a positron collides with an electron, they annihilate each other.
Advanced Usage
- "Positron emission": A type of radioactive decay where a proton in a nucleus is transformed into a neutron, releasing a positron and a neutrino.
- Positron emission tomography (PET) relies on detecting gamma rays from positron emission annihilations.
Variants and Related Words
- Positronic (adj): Relating to or involving positrons.
- The scientist studied the positronic decay process.
Synonyms
- Antielectron: A direct synonym for positron, emphasizing its nature as the antiparticle of the electron.
Related Phrases and Concepts
- Positron annihilation: The process where a positron and an electron collide and convert their mass into energy.
- The study of positron annihilation helps probe material defects.
- Positronium: A short-lived, hydrogen-like atom consisting of an electron and a positron bound together.
- Positronium chemistry explores interactions before annihilation occurs.
Noun
-
an elementary particle with positive charge; interaction of a positron and an electron results in annihilation
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