Abstract
The finite-element discrete variable representation combined with the method of complex coordinate rotation is implemented to investigate the hydrogenic atoms and alkali metals encapsulated by the fullerene cages. The energy levels varying with the confining potential of the fullerene cage exhibit avoided crossings caused by the so-called mirror collapse from the switch of near degenerate states. The effects of fullerene cages on photoionization of confined atoms leading to the oscillation behavior and confinement resonances in photoionization cross sections are demonstrated. The results of cross sections for hydrogen-like lithium ion as a function of the cage radius and shell thickness are presented. The emergence of the Cooper minima due to the influence of the fullerene cages is observed for endohedral lithium and sodium atoms. Comparisons are made to the existing predictions.
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References
Müller A. et al.: Significant redistribution of Ce 4d oscillator strength observed in photoionization of endohedral Ce@C +82 ions. Phys. Rev. Lett. 101, 133001 (2008)
Kilcoyne A.L.D. et al.: Confinement resonances in photoionization of Xe@C +60 . Phys. Rev. Lett. 105, 213001 (2010)
Madjet M.E. et al.: Photoionization of Xe inside C 60: atom-fullerene hybridization, giant cross-section enhancement, and correlation confinement resonances. Phys. Rev. A 81, 013202 (2010)
Connerade J.P. et al.: Electron structure of endohedrally confined atoms: atomic hydrogen in an attractive shell. J. Phys. B At. Mol. Opt. Phys. 32, L239 (1999)
Baltenkov A.S.: Resonances in the photoionization cross section of M@C 60 endohedrals. Phys. Lett. A 254, 203 (1999)
Dolmatov V.K. et al.: Structure and photoionization of confined atoms. Radiat. Phys. Chem. 70, 417 (2004)
Nascimento E.M. et al.: A study of the electron structure of endohedrally confined atoms using a model potential. J. Phys. B At. Mol. Opt. Phys. 44, 015003 (2011)
Rescigno T.N., McCurdy C.W.: Numerical grid methods for quantum-mechanical scattering problems. Phys. Rev. A 62, 032706 (2000)
Collins L.A. et al.: Time-dependent simulations of large-scale quantum dynamics. Phys. Scr. T 110, 408 (2004)
Balzer K., Bauch S., Bonitz M.: Efficient grid-based method in nonequilibrium Greens function calculations: application to model atoms and molecules. Phys. Rev. A 81, 022510 (2010)
Lin C.Y., Ho Y.K.: Photoionization cross sections of hydrogen impurities in spherical quantum dots using the finite-element discrete-variable representation. Phys. Rev. A 84, 023407 (2011)
Reinhardt W.P.: Complex coordinates in the theory of atomic and molecular structure and dynamics. Ann. Rev. Phys. Chem. 33, 223 (1982)
Junker B.R.: Recent computational developments in the use of complex scaling in resonance phenomena. Adv. At. Mol. Phys. 18, 207 (1982)
Ho Y.K.: The method of complex coordinate rotation and its applications to atomic collision processes. Phys. Rep. 99, 1 (1983)
Connerade J.P., Dolmatov V.K., Manson S.T.: On the nature and origin of confinement resonances. J. Phys. B At. Mol. Opt. Phys. 33, 2279 (2000)
Schweizer W., Faßbinder P., González-Férez R.: Model potentials for alkali metal atoms and Li-like ions. Atom data nucl. data 72, 33 (1999)
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This work is supported by the National Science Council of Taiwan (ROC).
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Lin, C.Y., Ho, Y.K. Photoionization of Endohedral Atoms in Fullerene Cages. Few-Body Syst 54, 425–429 (2013). https://doi.org/10.1007/s00601-012-0405-3
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DOI: https://doi.org/10.1007/s00601-012-0405-3