Separating Dipole and Quadrupole Contributions to Single-Photon Double Ionization
We report on a kinematically complete measurement of double ionization of helium by a single 1100 eV circularly polarized photon. By exploiting dipole selection rules in the two-electron continuum state, we observed the angular emission pattern of electrons originating from a pure quadrupole transition. Our fully differential experimental data and companion ab initio nonperturbative theory show the separation of dipole and quadrupole contributions to photo-double-ionization and provide new...[Show more]
|Collections||ANU Research Publications|
|Source:||Physical Review Letters|
|Access Rights:||Open Access|
|01_Grundmann_Separating_Dipole_and_2018.pdf||1.69 MB||Adobe PDF|
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