Nondipole effects in Xe 4d photoionization

Document Type



We measured the non-dipole parameters for the spin–orbit doublets Xe 4d5/2 and Xe 4d3/2 over a photon-energy range from 100 to 250 eV at beamline of the Advanced Light Source at the Lawrence Berkeley National Laboratory. Significant non-dipole effects are found at relatively low energies as a result of Cooper minima in dipole channels and interchannel coupling in quadrupole channels. Most importantly, sharp disagreement between experiment and theory, when otherwise excellent agreement was expected, has provided the first evidence of satellite two-electron quadrupole photoionization transitions, along with their crucial importance for a quantitatively accurate theory.


Atomic, Molecular and Optical Physics | Inorganic Chemistry | Nuclear | Physical Chemistry


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