What is the minimum energy needed to create a
What is the minimum energy needed to create a electron-positronpair when the photon collides with an electron? I know what to do when it collides with a nucleus, I can not figureout what to do about an electron.
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what is the minimum energy needed to create a electron-positronpair when the photon collides with an electron i know
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assume that a gold nucleus has a radius of 623 fm and analpha particle has a radius of 180 fm what energy must an
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