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Complete description of 3p photoionization in calcium

Within the dipole approximation and the LS-coupling limit 3p photoionization in atomic calcium is described completely by two matrix elements and one relative phase. These three parameters are extracted from experimental observables and compared with theoretical calculations (RRPA transformed to the non-relativistic limit) for photon energies around the Cooper minimum in the 3pd channel. Taking into account the intensity-borrowing model, excellent agreement between theoretical and experimental data is found.