The various multipole fields have particular values of angular momentum : E l radiation carries an angular momentum l in units of \ hbar; likewise, M l radiation carries an angular momentum l in units of \ hbar.
2.
If internal conversion takes place, the EM multipole fields of the nucleus do not result in the emission of a photon, instead, the fields interact with the atomic electrons and cause one of the electrons to be emitted from the atom.
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