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单词 positron
释义

Definition of positron in English:

positron

noun ˈpɒzɪtrɒnˈpɑzəˌtrɑn
Physics
  • A subatomic particle with the same mass as an electron and a numerically equal but positive charge.

    Example sentencesExamples
    • So the normally stable proton can decay into a neutron, a positron, and a neutrino if continuously fed enough energy through constant, extreme acceleration.
    • The decaying atoms emit positrons, which encounter electrons and are annihilated, releasing pairs of gamma rays.
    • The term accelerators most commonly refers to particle accelerators, devices for increasing the velocity of subatomic particles such as protons, electrons, and positrons.
    • The full scattering amplitude is the sum of all contributions from all possible loops of photons, electrons, positrons, and other available particles.
    • Electrons, positrons, and photons can be separated and isolated at macroscopic distances.

Origin

1930s: from positive + -tron.

 
 

Definition of positron in US English:

positron

nounˈpɑzəˌtrɑnˈpäzəˌträn
Physics
  • A subatomic particle with the same mass as an electron and a numerically equal but positive charge.

    Example sentencesExamples
    • The term accelerators most commonly refers to particle accelerators, devices for increasing the velocity of subatomic particles such as protons, electrons, and positrons.
    • The full scattering amplitude is the sum of all contributions from all possible loops of photons, electrons, positrons, and other available particles.
    • Electrons, positrons, and photons can be separated and isolated at macroscopic distances.
    • So the normally stable proton can decay into a neutron, a positron, and a neutrino if continuously fed enough energy through constant, extreme acceleration.
    • The decaying atoms emit positrons, which encounter electrons and are annihilated, releasing pairs of gamma rays.

Origin

1930s: from positive + -tron.

 
 
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更新时间:2024/12/23 23:06:23