Retrieving "Charge Neutrality" from the archives

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1. Electron Capture

   Linked via "charge neutrality"

   Electron capture rarely occurs in isolation; it is often found in competition with other decay mechanisms, particularly $\beta^+$ decay.
   The decision between $\text{EC}$ and $\beta^+$ decay hinges on the total decay energy available ($\Delta M$). The threshold energy required for $\beta^+$ decay (positron emission) is $2m_e c^2$ (twice the rest mass of an electron) greater than the threshold for electron capture, because the $\beta^+$ process must create a [positron](/entries/posit…