作者sulanpa (...)
看板Physics
標題[題目] pair production
時間Sat Mar 26 14:04:01 2011
[領域] 近代物理 (題目相關領域)
[來源] 課本習題 (課本習題、考古題、參考書...)
[題目] Verify that the minimum energy a photon must have to create an electron
-positron pair in the presence of a stationary nucleus of mass M is
2mc^2(1+(m/M)), where m is the electron rest mass.
[瓶頸] 課本上是寫說光子動量一部分被nucleus吸收，才能動量守恆兼能量守恆
可是他吸收的模式是什麼呢?
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