| 释义 |
Definition of positron in English: positronnoun 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: positronnounˈpɑzəˌtrɑnˈpäzəˌträn 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. |