Meaning of selection rule in English:

selection rule


  • A rule which describes whether particular quantum transitions in an atom or molecule are allowed or forbidden.

    ‘This issue is related to the inhibition of carrier relaxation due to the selection rule of interaction between electrons and phonons in discrete energy level systems.’
    • ‘Because the selection rules for one- and two-photon transitions differ, it is possible that 2PE can occur at energies where no corresponding one-photon absorption exists.’
    • ‘There are simple selection rules that usually work in spectroscopy, corresponding to the known properties of atoms.’