Retrieving "L Shell" from the archives

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1. Electron Capture

   Linked via "L-shell"

   Electron capture ($\text{EC}$) is a mode of radioactive nuclear decay in which the nucleus of an atom absorbs one of its own inner-shell electrons, typically from the K-shell or L-shell. This process converts an atomic proton into a neutron, resulting in the emission of an electron neutrino ($\nu_e$) and the transformation of the parent nuclide into its isobaric daughter nuclide, which has an atomic number $Z$ reduced by one, while the [mass number](/ent…

2. Electron Capture

   Linked via "L-shell"

   The probability of electron capture is highly dependent on the overlap integral between the nuclear wavefunction and the electron wavefunction at the nuclear radius. This leads to the overwhelming preference for capture from the $s$-orbitals (K-shell, $1s_{1/2}$), as these shells possess a non-zero probability density at the nucleus ($r=0$).
   The Capture Ratio ($P$) for K-shell capture versus L-shell capture ($P = \frac{\lambdaK}{\lambdaL}$) is extremely se…