Abstract

Polarization correlations between photons emitted in dielectronic recombination (DR) of initially hydrogen-like ions are analysed based on a density matrix approach and relativistic Dirac's theory. Special attention is given to the non-dipole contributions in the photon field expansion of the electron–photon interaction. In particular, we apply our general formalism to the radiative decay of the L1/2L3/2 resonance that is formed in DR of (initially) hydrogen-like uranium ions. The corresponding calculations show that a mixing between the leading electric dipole (E1) and the magnetic quadrupole (M2) transitions can significantly affect the polarization correlations between the emitted photons.

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