Double photoionization of Be and Mg atoms using the R -matrix-with-pseudostates method

Griffin, D. C.; Pindzola, M. S.; Ballance, C. P.; Colgan, J.

doi:10.1103/physreva.79.023413

Double photoionization of Be and Mg atoms using the $R$ -matrix-with-pseudostates method

Journal Article · Sat Jan 31 23:00:00 EST 2009 · Physical Review. A

DOI:https://doi.org/10.1103/physreva.79.023413· OSTI ID:1564662

Griffin, D. C.; Pindzola, M. S.; Ballance, C. P.; Colgan, J.

The R-matrix-with-pseudostates (RMPS) method is used to obtain total cross sections for double photoionization of Be and Mg atoms from their ground singlet and metastable triplet terms. Time-dependent close-coupling (TDCC) calculations are also carried out for the total and energy differential double photoionization cross sections of Mg from its ground term. The RMPS total ground-term cross sections for Be and Mg are in good agreement with results from TDCC and convergent close-coupling calculations at lower energies but are above them at higher energies. They are also in good agreement with the results of synchrotron measurements. The total cross sections for double photoionization from the triplet metastable terms of Be and Mg are found to be two to three times smaller than those from their singlet ground terms.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF), Oak Ridge, TN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: AC52-06NA25396

OSTI ID:: 1564662

Journal Information:: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 79; ISSN PLRAAN; ISSN 1050-2947

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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