Lawrence Berkeley National Laboratory

The hydride anion H- would not be bound in the absence of electron correlation. Electron correlation drives the double photoionization process and, thus should impact double photoionization results most strongly for H-. We present fully differential cross sections for the three-body breakup of H- by single photon absorption. The absolute triple-differential and single-differential cross sections were yielded by ab initio calculations making use of exterior complex scaling within a discrete variable representation partialwave basis. Results calculated at photon energies of 18eV and 30eV are compared with reported cross sections for helium calculated at 20eV above the double ionization threshold. These comparisons show a clear signature of initial state correlation that differentiate the He and H- cases.