“pair production”的概念、定义、习题解题方法及翻译-物理辞典

单词	pair production
释义	pair production The creation of an electron and a positron from a photon in a strong electric field, such as that surrounding an atomic nucleus. The electron and the positron each have a mass of about 9 × 10^-31 kg, which is equivalent on the basis of the mass—energy equation ( E = mc² ) to a total of 16 × 10^-14 J. The frequency, v, associated with a photon of this energy (according to E = hv ) is 2.5 × 10²⁰ Hz. Pair production thus requires photons of high quantum energy (Bremsstrahlung or gamma rays). Any excess energy is taken up as kinetic energy of the products
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。