Two-photon double photoionization of atomic Mg by ultrashort pulses
ORAL
Abstract
We investigate the two-photon double ionization of atomic magnesium induced by ultrashort pulses. Much like for beryllium, and in contrast to helium, the range of photon energies for which nonsequential ionization is the only open pathway is very narrow (less than 1~eV). Thus, sequential ionization pathways feature heavily in these processes. The greater significance of excited-state correlating configurations in representing the initial state of magnesium has consequences on the resulting angular distributions at photon energies where sequential ionization can access intermediate states that lie nearby in energy, particularly when the pulse length is increased.
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Authors
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Frank L Yip
California State University-Maritime Academy
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R. Y. Bello
Lawrence Berkeley National Laboratory, U. C. Davis and Lawrence Berkeley National Lab.
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Thomas N Rescigno
Lawrence Berkeley National Laboratory
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Robert R Lucchese
Lawrence Berkeley National Laboratory
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C. William McCurdy
Lawrence Berkeley National Laboratory, UC Davis, Lawrence Berkeley National Laboratory, and University of California, Davis