If the nucleus decayed into the daughter nucleus and an electron, the electron would always have the same momentum, and the same energy.

如果原子核衰变成子核和电子，则电子将始终具有相同的动量和相同的能量。

In alpha decay, there’s a parent nucleus – which is the original, unstable nucleus – and it decays into a daughter nucleus and an alpha particle, which is actually just the nucleus of a Helium atom.

在 alpha 衰变中，有一个母核——它是原始的、不稳定的核——它衰变成一个子核和一个 alpha 粒子，它实际上只是一个氦原子的核。