Photoionization microscopy in terms of local frame transformation theory

POSTER

Abstract

Two-photon ionization of an alkali-metal atom in the presence of a uniform electric field is investigated using a standardized form of the local frame transformation and generalized quantum defect theory. The relevant long-range quantum defect parameters in the combined Coulombic plus Stark potential are calculated with eigenchannel R-matrix theory applied in the downstream parabolic coordinate $\eta$. The present formulation permits us to express the corresponding microscopy observables through the local frame transformation, and it gives a critical test of the accuracy of the Harmin-Fano theory.

*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award numbers DE-SC0010545 (for P.G and C.H.G.) and DE-SC0012193 (for F.R.).

Authors

  • P. Giannakeas

    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA

  • F. Robicheaux

    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA

  • C.H. Greene

    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA