光子不仅有能量，而且还有动量，正电子与电子以相同的速率发生对碰形成静止的整体后，可以转变为光子（γ），其核反应方程正确的是_刷题宝

题干

光子不仅有能量，而且还有动量，正电子与电子以相同的速率发生对碰形成静止的整体后，可以转变为光子（γ），其核反应方程正确的是（）

A： $_{+ 1}^{0}$ e+ $_{- 1}^{0}$ e→γ

B： $_{+ 1}^{0}$ e+ $_{- 1}^{0}$ e→2γ

C： $_{+ 1}^{0}$ e+ $_{- 1}^{0}$ e→3γ

D： $_{+ 1}^{0}$ e+ $_{- 1}^{0}$ e→5γ

上一题下一题 0.0难度选择题更新时间:2019-07-13 12:09:31

答案(点此获取答案解析）

B

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