positron
Electron's mirror particle
A positron is the antimatter counterpart of an electron—identical in mass but carrying a positive rather than negative charge.
When a positron meets an electron, both are annihilated, releasing energy as gamma rays.
Positrons are used in medical imaging through PET (positron emission tomography) scans.
Opposite-charge subatomic twin
- antimatterSubstance of antiparticles
- annihilationUtter, complete destruction
- gamma rayHigh-energy nuclear emission
- beta decayRadioactive nucleon transformation process
Dirac · Anderson · PET scan · lepton · particle accelerator · antielectron · collision · spin
Opposite-charge subatomic twin
- antielectronElectron's antimatter counterpart
- annihilationUtter, complete destruction
- antimatterSubstance of antiparticles
- quarkFundamental matter particle
lepton · baryon · meson · gluon · boson · fermion · hadron · muon
Emitting nuclear decay particles
- emissionDischarged substance or act
- neutrinoUncharged, near-massless particle
- nucleusCentral controlling part
- protonPositive nuclear particle
isotope · half-life · transmutation · weak force · decay · nuclear · potassium-40 · carbon-11
Minute piece of matter
- subatomicSmaller than atoms
- spinRapid rotation around axis
- chargeCost or accusation
- massQuantity of matter
energy · momentum · velocity · quantum · field theory · accelerator · collider · CERN
Imaging via cross-sections
- imagingProducing visual representations
- tracerPath-marking projectile
- radionuclideDecay-prone atomic nucleus
- scannerDevice that reads data
oncology · neurology · radiology · metabolism · Alzheimer's · dementia · tumor · glioma
antiparticle
Opposite-charge subatomic twin
- antimatterSubstance of antiparticles
- annihilationUtter, complete destruction
- gamma rayHigh-energy nuclear emission
beta decay · Dirac · Anderson · PET scan · lepton · particle accelerator · antielectron · collision · spin · charge
antiparticle
Opposite-charge subatomic twin
- antielectronElectron's antimatter counterpart
- annihilationUtter, complete destruction
- antimatterSubstance of antiparticles
quark · lepton · baryon · meson · gluon · boson · fermion · hadron · muon · tau
radioactive
Emitting nuclear decay particles
- emissionDischarged substance or act
- neutrinoUncharged, near-massless particle
- nucleusCentral controlling part
proton · isotope · half-life · transmutation · weak force · decay · nuclear · potassium-40 · carbon-11
particle
Minute piece of matter
mass · energy · momentum · velocity · quantum · field theory · accelerator · collider · CERN · gamma ray
tomography
Imaging via cross-sections
- imagingProducing visual representations
- tracerPath-marking projectile
- radionuclideDecay-prone atomic nucleus
scanner · oncology · neurology · radiology · metabolism · Alzheimer's · dementia · tumor · glioma · amyloid
- physicsphysics, momentum, atom, acceleration, gravity
- charged particlesion, cation, anion, proton, alpha particle
- particleselectrons, protons, proton, neutrons, neutron
- leptonsmuon, tau
- particle physicsquark, quarks, lepton, leptons, boson
- Antimatterantiparticle, antiproton, antineutron, antiquark, antineutrino