Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 37, Issue 23, Pages L377-L384Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/37/23/L01
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Photoionization cross sections for both atomic helium and molecular hydrogen are calculated using a time-dependent close-coupling method. The total electronic wavefunction for the two-electron system is expanded in six dimensions, where four dimensions are represented on a radial and angular lattice and a coupled channels expansion is used to represent the other two dimensions. Double photoionization cross sections are obtained for both He and H-2 for a range of photon energies above the complete fragmentation threshold. Comparisons are made with absolute experimental measurements.
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