Physics Unit32: Elementary Particles (id: a07eccc18)

本题目来源于试卷: Physics Unit32: Elementary Particles，类别为 国际高中通用物理

[单选题]
When a positronium atom (electron + xblxe wm7jpwux r-8hv;.31 :ss4o + bnpositron) decac 6m.0 p;q4c1azekz gsys, it emits two photons. What are the energies of the photons?ca1ge; zm.qpkc 4z0s 6

A. 0.511 MeV and 1.022 MeV
B. 0.225 MeV and 0.285 MeV
C. 0.256 MeV and 0.256 MeV
D. 0.511 MeV and 0.511 MeV


参考答案:  D


本题详细解析: 暂无

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