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单词 annihilation radiation
释义

WordReference Random House Unabridged Dictionary of American English © 2024
annihilation radia′tion, [Physics.]
  1. Physicselectromagnetic radiation produced by the coalescence and mutual annihilation of a positron and an electron, each pair forming two photons having a minimum energy of 0.5 million electron volts each.
  • 1960–65

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