Many-electron strong-field physics

References

• L'Huillier , A. , Lompre , L. A. , Mainfray , G. and Manus , C. 1983 . Multiply charged ions induced by multiphoton absorption in rare gases at 0.53 μm . Phys. Rev. A , 27 : 2503 – 2512 .
   Web of Science ®Google Scholar
• Walker , B. , Sheehy , B. , DiMauro , L. F. , Agostini , P. , Schafer , K. J. and Kulander , K. C. 1994 . Precision measurement of strong field double ionization of helium . Phys. Rev. Lett. , 73 : 1227 – 1230 .
   PubMed Web of Science ®Google Scholar
• Augst , S. , Talebpour , A. , Chin , S. L. , Beaudoin , Y. and Chaker , M. 1995 . Nonsequential triple ionization of argon atoms in a high-intensity laser field . Phys. Rev. A , 52 : R917 – R919 . ; S. Larochelle, A. Talebpour, and S.L. Chin, Non-sequential multiple ionization of rare gas atoms in a Ti:Sapphire laser field, J. Phys. B 31 (1998), pp. 1201–1214
   PubMed Web of Science ®Google Scholar
• Javanainen , J. , Eberly , J. H. and Su , Q. 1988 . Numerical simulations of multiphoton ionization and above-threshold electron spectra . Phys. Rev. A , 38 : 3430 – 3446 . ; Q. Su and J.H. Eberly, Model atom for multiphoton physics, ibid. 44 (1991), pp. 5997–6008
   Web of Science ®Google Scholar
• Grobe , R. and Eberly , J. H. 1992 . Photoelectron spectra for a two-electron system in a strong laser field . Phys. Rev. Lett. , 68 : 2905 – 2908 .
   PubMed Web of Science ®Google Scholar
• Lappas , D. G. , Sanpera , A. , Watson , J. B. , Burnett , K. , Knight , P. L. , Grobe , R. and Eberly , J. H. 1996 . Two-electron effects in harmonic generation and ionization from a model He atom . J. Phys. B , 29 : L619 – L627 .
   Google Scholar
• Bauer , D. 1997 . Two-dimensional, two-electron model atom in a laser pulse: Exact treatment, single-active-electron analysis, time-dependent density-functional theory, classical calculations, and nonsequential ionization . Phys. Rev. A , 56 : 3028 – 3039 .
   Web of Science ®Google Scholar
• Liu , W.-C. , Eberly , J. H. , Haan , S. L. and Grobe , R. 1999 . Correlation effects in two-electron model atoms in intense laser fields . Phys. Rev. Lett. , 83 : 520 – 523 .
   Web of Science ®Google Scholar
• Watson , J. B. , Sanpera , A. , Lappas , D. G. , Knight , P. L. and Burnett , K. 1997 . Nonsequential double ionization of helium . Phys. Rev. Lett. , 78 : 1884 – 1887 .
   Web of Science ®Google Scholar
• Burnett , K. , Watson , J. B. , Sanpera , A. and Knight , P. L. 1998 . Phil. Trans. R. Soc. Lond. A , 356 : 317 – 328 .
   Google Scholar
• Smyth , E. S. , Parker , J. S. and Taylor , K. T. 1998 . Numerical integration of the time-dependent Schrödinger equation for laser-driven helium . Comput. Phys. Commun. , 144 : 1 – 14 .
   Google Scholar
• Taylor , K. T. , Parker , J. S. , Dundas , D. and Meharg , K. J. 2007 . Theory of laser-driven double-ionization of atoms at Ti:sapphire laser wavelengths . J. Mod. Opt. , 54 : 1959 – 1983 .
   Web of Science ®Google Scholar
• Parker , J. S. , Doherty , B. J.S. , Taylor , K. T. , Schultz , K. D. , Blaga , C. I. and DiMauro , L. F. 2006 . High-energy cutoff in the spectrum of strong-field nonsequential double ionization . Phys. Rev. Lett. , 96 : 133001-1 – 4 .
   Google Scholar
• Ruiz , C. , Roso , L. and Becker , A. 2006 . Ab initio calculation of the double ionization of helium in a few-cycle laser pulse beyond the one-dimensional approximation . Phys. Rev. Lett. , 96 : 053001-1 – 4 .
   Google Scholar
• Becker , A. and Faisal , F. H.M. 1996 . Mechanism of laser-induced double ionization of helium . J. Phys. B , 29 : L197 – L202 . ; Interplay of electron correlation and intense field dynamics in the double ionization of helium, Phys. Rev. A 59 (1999), pp. R1742–R1745
   Web of Science ®Google Scholar
• Kuchiev , M. Yu. 1995 . ATI as a source for multiply charged ion production in a laser field . J. Phys. B , 28 : 5093 – 5115 .
   Google Scholar
• Panfili , R. , Eberly , J. H. and Haan , S. L. 2001 . Comparing classical and quantum simulations of strong-field double-ionization . Opt. Express , 8 : 431 – 435 .
   PubMed Web of Science ®Google Scholar
• Ho , P. J. , Panfili , R. , Haan , S. L. and Eberly , J. H. 2005 . Nonsequential double ionization as a completely classical photoelectric effect . Phys. Rev. Lett. , 94 : 093002-1 – 4 .
   Google Scholar
• LaGattuta , K. J. and Cohen , J. S. 1998 . Quasiclassical modelling of helium double photoionization . J. Phys. B , 31 : 5281 – 5291 .
   Google Scholar
• Chen , J. , Liu , J. , Fu , L. B. and Zheng , W. M. 2000 . Interpretation of momentum distribution of recoil ions from laser-induced nonsequential double ionization by semiclassical rescattering model . Phys. Rev. A , 63 : 011404R-1 – 4 .
   Google Scholar
• Wolkov , D. M. 1935 . Über eine Klasse von Lösungen der Diracschen Gleichung . Zs. Phys. , 94 : 250 – 260 .
   Google Scholar
• Corkum , P. B. 1993 . Plasma perspective on strong field multiphoton ionization . Phys. Rev. Lett. , 71 : 1994 – 1997 .
   PubMed Web of Science ®Google Scholar
• Dörner , R. , Weber , Th. , Weckenbrock , M. , Staudte , A. , Hattas , M. , Schmidt-Böcking , H. , Moshammer , R. and Ullrich , J. 2002 . Multiple ionization in strong laser fields . Adv. At., Mol., Opt. Phys. , 48 : 1 – 34 .
   Web of Science ®Google Scholar
• Becker , A. , Dörner , R. and Moshammer , R. 2005 . Multiple fragmentation of atoms in femtosecond laser pulses . J. Phys. B , 38 : S753 – S772 .
   Google Scholar
• Figueira de Morisson Faria , C. , Liu , X. and Becker , W. 2007 . “ S-matrix theory of nonsequential double ionization ” . In Progress in Ultrafast Intense Laser Science, vol. II , Edited by: Yamanouchi , K. , Chin , S. L. , Agostini , P. and Ferrante , G. 65 – 95 . Berlin : Springer .
   Google Scholar
• Moshammer , R. , Feuerstein , B. , Schmitt , W. , Dorn , A. , Schröter , C. D. , Ullrich , J. , Rottke , H. , Trump , C. , Wittmann , M. , Korn , G. , Hoffmann, , K. and Sandner , W. 2000 . Momentum distributions of Nen+ ions created by an intense ultrashort laser pulse . Phys. Rev. Lett. , 84 : 447 – 450 .
   PubMed Web of Science ®Google Scholar
• Weber , Th. , Weckenbrock , G. , Staudte , A. , Spielberger , L. , Jagutzki , O. , Mergel , V. , Afaneh , F. , Urbasch , G. , Vollmer , M. , Giessen, , H. and Dörner , R. 2000 . Recoil-ion momentum distributions for single and double ionization of helium in strong laser fields . Phys. Rev. Lett. , 84 : 443 – 446 .
   PubMed Web of Science ®Google Scholar
• Ullrich , J. , Moshammer , R. , Dorn , A. , Dörner , R. , Schmidt , L. Ph.H. and Schmidt-Böcking , H. 2003 . Recoil-ion and electron momentum spectroscopy: reaction-microscopes . Rep. Prog. Phys. , 66 : 1463 – 1545 .
   Web of Science ®Google Scholar
• Dörner , R. , Mergel , V. , Jagutzki , O. , Spielberger , L. , Ullrich , J. , Moshammer , R. and Schmidt-Böcking , H. 2000 . Cold target recoil ion momentum spectroscopy: a ‘momentum microscope’ to view atomic collision dynamics . Phys. Rep. , 330 : 95 – 192 .
   Web of Science ®Google Scholar
• Paulus , G. G. , Lindner , F. , Walther , H. , Baltuška , A. , Goulielmakis , E. , Lezius , M. and Krausz , F. 2003 . Measurement of the phase of few-cycle laser pulses . Phys. Rev. Lett. , 91 : 253004-1 – 4 .
   Google Scholar
• Liu , X. , Rottke , H. , Eremina , E. , Sandner , W. , Goulielmakis , E. , Keeffe , K. O. , Lezius , M. , Krausz , F. , Lindner , F. , Schätzel , M. G. , Paulus , G. G. and Walther , H. 2004 . Nonsequential double ionization at the single-optical-cycle limit . Phys. Rev. Lett. , 93 : 263001-1 – 4 .
   Google Scholar
• Weber , Th. , Giessen , H. , Weckenbrock , M. , Urbasch , G. , Staudte , A. , Spielberger , L. , Jagutzki , O. , Mergel , V. , Vollmer, , M. and Dörner , R. 2000 . Correlated electron emission in multiphoton double ionization . Nature (London) , 405 : 658 – 661 .
   PubMed Web of Science ®Google Scholar
• Moshammer , R. , Feuerstein , B. , Crespo López-Urrutia , J. , Deipenwisch , J. , Dorn , A. , Fischer , D. , Höhr , C. , Neumayer , P. , Schröter , C. D. , Ullrich , J. , Rottke , H. , Trump , C. , Wittmann , M. , Korn, , G. and Sandner , W. 2002 . Correlated two-electron dynamics in strong-field double ionization . Phys. Rev. A , 65 : 035401-1 – 4 .
   Google Scholar
• Moshammer , R. , Ullrich , J. , Feuerstein , B. , Fischer , D. , Dorn , A. , Schröter , C. D. , Crespo López-Urrutia , J. R. , Höhr , C. , Rottke , H. , Trump , C. , Wittmann , M. , Korn , G. , Hoffmann, , K. and Sandner , W. 2003 . Strongly directed electron emission in non-sequential double ionization of Ne by intense laser pulses . J. Phys. B , 36 : L113 – L119 .
   Web of Science ®Google Scholar
• Staudte , A. , Ruiz , C. , Schöffler , M. , Schössler , S. , Zeidler , D. , Weber , Th. , Meckel , M. , Villeneuve , D. M. , Corkum , P. B. , Becker, , A. and Dörner , R. 2007 . Binary and recoil collisions in strong field double ionization of helium . Phys. Rev. Lett. , 99 : 263002-1 – 4 .
   Google Scholar
• Rudenko , A. , de Jesus , V. L.B. , Ergler , Th. , Zrost , K. , Feuerstein , B. , Schröter , C. D. , Moshammer , R. and Ullrich , J. 2007 . Correlated two-electron momentum spectra for strong-field nonsequential double ionization of He at 800 nm . Phys. Rev. Lett. , 99 : 263003-1 – 4 .
   Google Scholar
• Feuerstein , B. , Moshammer , R. , Fischer , D. , Dorn , A. , Schröter , C. D. , Deipenwisch , J. , Crespo López-Urrutia , J. R. , Höhr , C. , Neumayer , P. , Ullrich , J. , Rottke , H. , Trump , C. , Wittmann , M. , Korn , G. and Sandner , W. 2001 . Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: The role of excitation tunneling . Phys. Rev. Lett. , 87 : 043003-1 – 4 .
   Google Scholar
• Alnaser , A. S. , Comtois , D. , Hasan , A. T. , Villeneuve , D. M. , Kieffer , J. C. and Litvinyuk , I. V. 2008 . Strong-field non-sequential double ionization: wavelength dependence of ion momentum distributions for neon and argon . J. Phys. B , 41 : 031001-1 – 5 .
   Google Scholar
• Gubbini , E. , Eichmann , U. , Kalashnikov , M. and Sandner , W. 2005 . Strong laser field ionization of Kr: first-order relativistic effects defeat rescattering . J. Phys. B , 38 : L87 – L93 .
   Google Scholar
• Palaniyappan , S. , DiChiara , A. , Chowdhury , E. , Falkowski , A. , Ongadi , G. , Huskins , E. L. and Walker , B. C. 2005 . Ultrastrong field ionization of Nen+(n ≤ 8): Rescattering and the role of the magnetic field . Phys. Rev. Lett. , 94 : 243003-1 – 4 .
   Google Scholar
• Eichmann , U. , Dörr , M. , Maeda , H. , Becker , W. and Sandner , W. 2000 . Collective multielectron tunneling ionization in strong fields . Phys. Rev. Lett. , 84 : 3550 – 3553 .
   PubMed Web of Science ®Google Scholar
• Zon , B. A. 1999 . Many-electron tunneling in atoms . JETP , 89 : 219 – 222 .
   Google Scholar
• Kulander , K. C. , Schafer , K. J. and Krause , J. L. 1993 . Super-intense Laser–Atom Physics , Edited by: Piraux , B. , l'Huillier , A. and Rzążewski , K. 95 – 110 . New York : Plenum .
   Google Scholar
• Landau , L. D. and Lifschitz , E. M. 1977 . Quantum Mechanics (Nonrelativistic Theory) , Oxford : Pergamon Press .
   Google Scholar
• Corkum , P. B. and Krausz , F. 2007 . Attosecond science . Nature Phys. , 3 : 381 – 387 .
   Web of Science ®Google Scholar
• Kienberger , R. , Goulielmakis , E. , Uiberacker , M. , Baltuska , A. , Yakovlev , V. , Bammer , F. , Scrinzi , A. , Westerwalbesloh , Th. , Kleineberg , U. , Heinzmann , U. , Drescher, , M. and Krausz , F. 2004 . Atomic transient recorder . Nature (London) , 427 : 817 – 821 .
   PubMed Web of Science ®Google Scholar
• Weckenbrock , M. , Zeidler , D. , Staudte , A. , Weber , Th. , Schöffler , M. , Meckel , M. , Kammer , S. , Smolarski , M. , Jagutzki , O. , Bhardwaj , V. R. , Rayner , D. M. , Villeneuve , D. M. , Corkum , P. B. and Dörner , R. 2004 . Fully differential rates for femtosecond multiphoton double ionization of neon . Phys. Rev. Lett. , 92 : 213002-1 – 4 .
   Google Scholar
• Fittinghoff , D. N. , Bolton , P. R. , Chang , B. and Kulander , K. C. 1994 . Polarization dependence of tunneling ionization of helium and neon by 120-fs pulses at 614 nm . Phys. Rev. A , 49 : 2174 – 2177 .
   PubMed Web of Science ®Google Scholar
• Dietrich , P. , Burnett , N. H. , Ivanov , M. Yu. and Corkum , P. B. 1994 . High-harmonic generation and correlated two-electron multiphoton ionization with elliptically polarized light . Phys. Rev. A , 50 : R3585 – R3588 .
   PubMed Web of Science ®Google Scholar
• Paulus , G. G. , Becker , W. , Nicklich , W. and Walther , H. 1994 . Rescattering effects in above-threshold ionization: a classical model . J. Phys. B , 27 : L703 – L708 .
   Web of Science ®Google Scholar
• Figueira de Morisson Faria , C. , Schomerus , H. , Liu , X. and Becker , W. 2004 . Electron-electron dynamics in laser-induced nonsequential double ionization . Phys. Rev. A , 69 : 043405-1 – 17 .
   Google Scholar
• Okunishi , M. , Morishita , T. , Prümper , G. , Shimada , K. , Lin , C. D. , Watanabe , S. and Ueda , K. 2008 . Experimental retrieval of target structure information from laser-induced rescattered photoelectron momentum distributions . Phys. Rev. Lett. , 100 : 143001-1 – 4 .
   Google Scholar
• van der Hart , H. W. 2001 . Electron-impact ionization of He+: consequences for double ionization of He in strong laser fields . J. Phys. B , 34 : L147 – L155 .
   Google Scholar
• Spanner , M. , Smirnova , O. , Corkum , P. B. and Ivanov , M. Yu. 2004 . Reading diffraction images in strong field ionization of diatomic molecules . J. Phys. B , 37 : L243 – L250 .
   Web of Science ®Google Scholar
• Kuchiev , M. Yu. 1987 . Atomic antenna . Pis'ma Zh. Eksp. Teor. Fiz. , 45 : 319 – 321 . [Engl. translation: JETP Lett. 45 (1987), pp. 404–406]
   Google Scholar
• Kulander , K. C. , Cooper , J. and Schafer , K. J. 1995 . Laser-assisted inelastic rescattering during above-threshold ionization . Phys. Rev. A , 51 : 561 – 568 .
   PubMedGoogle Scholar
• Becker , A. and Faisal , F. H.M. 2005 . Intense-field many-body S-matrix theory . J. Phys. B , 38 : R1 – R56 .
   Web of Science ®Google Scholar
• Keldysh , L. V. 1964 . Ionization in the field of a strong electromagnetic wave . Zh. Eksp. Teor. Fiz. , 47 : 1945 – 1957 . [Ionization in the field of a strong electromagnetic wave, Sov. Phys. JETP 20 (1965), pp. 1307–1314]
   Google Scholar
• Faisal , F. H.M. 1973 . Multiple absorption of laser photons by atoms . J. Phys. B , 6 : L89 – L92 .
   Web of Science ®Google Scholar
• Reiss , H. R. 1980 . Effect of an intense electromagnetic field on a weakly bound system . Phys. Rev. A , 22 : 1786 – 1813 .
   Web of Science ®Google Scholar
• Lewenstein , M. 1994 . Theory of high-harmonic generation by low-frequency laser fields . Phys. Rev. A , 49 : 2117 – 2132 .
   PubMed Web of Science ®Google Scholar
• Lohr , A. , Kleber , M. , Kopold , R. and Becker , W. 1997 . Above-threshold ionization in the tunneling regime . Phys. Rev. A , 55 : R4003 – R4006 .
   Web of Science ®Google Scholar
• Becker , A. and Faisal , F. H.M. 2000 . Interpretation of momentum distribution of recoil ions from laser induced nonsequential double ionization . Phys. Rev. Lett. , 84 : 3546 – 3549 . S-matrix analysis of coincident measurement of two-electron energy distribution for double ionization of He in an intense laser field, ibid. 89 (2002), pp. 193003-1–4
   PubMed Web of Science ®Google Scholar
• Kopold , R. , Becker , W. , Rottke , H. and Sandner , W. 2000 . Routes to nonsequential double ionization . Phys. Rev. Lett. , 85 : 3781 – 3784 .
   PubMed Web of Science ®Google Scholar
• Figueira de Morisson Faria , C. , Liu , X. , Becker , W. and Schomerus , H. 2004 . Coulomb repulsion and quantum-classical correspondence in laser-induced nonsequential double ionization . Phys. Rev. A , 69 : 021402R-1 – 4 .
   Google Scholar
• Arfken , See, e.g. G. 1985 . Mathematical Methods for Physicists , 3rd ed. , Boston : Academic Press .
   Google Scholar
• Salières , P. , Carre , B. , Le Deroff , L. , Grasbon , F. , Paulus , G. G. , Walther , H. , Kopold , R. , Becker , W. , Milosevie , D. B. , Sanpera, , A. and Lewenstein , M. 2001 . Feynman's path-integral approach for intense-laser-atom interactions . Science , 292 : 902 – 905 .
   PubMed Web of Science ®Google Scholar
• Paulus , See, e.g. G. G. , Grasbon , F. , Walther , H. , Kopold , R. and Becker , W. 2001 . Channel-closing-induced resonances in the above-threshold ionization plateau . Phys. Rev. A , 64 : 021401R-1 – 4 .
   Google Scholar
• Popruzhenko , S. V. , Korneev , Ph.A. , Goreslavski , S. P. and Becker , W. 2002 . Laser-induced recollision phenomena: interference resonances at channel closings . Phys. Rev. Lett. , 89 : 023001-1 – 4 .
   Google Scholar
• Popruzhenko , S. V. and Goreslavskii , S. P. 2001 . Photoelectron momentum distribution for double ionization in strong laser fields . J. Phys. B , 34 : L239 – L246 . S.P. Goreslavski and S.V. Popruzhenko, Nonsequential double ionization: a quasiclassical analysis of the Keldysh-type transition amplitude, Opt. Express 8 (2001), pp. 395–400
   Web of Science ®Google Scholar
• Goreslavskii , S. P. , Popruzhenko , S. V. , Kopold , R. and Becker , W. 2001 . Electron-electron correlation in laser-induced nonsequential double ionization . Phys. Rev. A , 64 : 053402-1 – 5 .
   Google Scholar
• Figueira de Morisson Faria , C. and Lewenstein , M. 2005 . Bound-state corrections in laser-induced nonsequential double ionization . J. Phys. B , 38 : 3251 – 3271 .
   Google Scholar
• Lein , M. , Gross , E. K.U. and Engel , V. 2000 . Intense-field double ionization of helium: identifying the mechanism . Phys. Rev. Lett. , 85 : 4707 – 4710 .
   PubMed Web of Science ®Google Scholar
• Brabec , T. and Krausz , F. 2000 . Intense few-cycle laser fields: Frontiers of nonlinear optics . Rev. Mod. Phys. , 72 : 545 – 591 .
   Web of Science ®Google Scholar
• Paulus , G. G. , Grasbon , F. , Walther , H. , Villoresi , P. , Nisoli , M. , Stagira , S. , Priori , E. and De Silvestri , S. 2001 . Absolute-phase phenomena in photoionization with few-cycle laser pulses . Nature (London) , 414 : 182 – 184 .
   PubMed Web of Science ®Google Scholar
• Eremina , E. , Liu , X. , Roltke , H. , Sandner , W. , Dreischuh , A. , Lindner , F. , Grasbon , F. , Paulus , G. G. , Walther , H. , Moshammer , R. , Feuerstein , B. and Ullrich , J. 2003 . Laser-induced non-sequential double ionization investigated at and below the threshold for electron impact ionization . J. Phys. B , 36 : 3269 – 3280 .
   Web of Science ®Google Scholar
• Rudenko , A. , Zrost , K. , Feuerstein , B. , de Jesus , V. L.B. , Schröter , C. D. , Moshammer , R. and Ullrich , J. 2004 . Correlated multielectron dynamics in ultrafast laser pulse interactions with atoms . Phys. Rev. Lett. , 93 : 253001-1 – 4 .
   Google Scholar
• Zrost , K. , Rudenko , A. , Ergler , Th. , Feuerstein , B. , de Jesus , V. L.B. , Schröter , C. D. , Moshammer , R. and Ullrich , J. 2006 . Multiple ionization of Ne and Ar by intense 25 fs laser pulses: few-electron dynamics studied with ion momentum spectroscopy . J. Phys. B , 39 : S371 – S380 .
   Google Scholar
• See, e.g. W. Forst, Theory of Unimolecular Reactions, Academic Press, New York, 1973; P.J. Robinson and K.A. Holbrook, Unimolecular Reactions, Wiley-Interscience, New York, 1972; R. Hagedorn, Statistical thermodynamics of strong interactions at high energies, Nuovo Cimento Suppl. 3 (1965), pp. 147–186
   Google Scholar
• Liu , X. , Figueira de Morisson Faria , C. , Becker , W. and Corkum , P. B. 2006 . Attosecond electron thermalization by laser-driven electron recollision in atoms . J. Phys. B , 39 : L305 – L311 .
   Google Scholar
• Liu , X. , Figueira de Morisson Faria , C. and Becker , W. 2008 . Attosecond electron thermalization in laser-induced nonsequential multiple ionization: hard versus glancing collisions . New J. Phys. , 10 : 025010-1 – 18 .
   Google Scholar
• Delone , N. B. and Krainov , V. K. 1991 . Energy and angular electron spectra for the tunnel ionization of atoms by strong low-frequency radiation . J. Opt. Soc. Am. B , 8 : 1207 – 1211 .
   Web of Science ®Google Scholar
• Chen , J. and Nam , C. H. 2002 . Ion momentum distributions for He single and double ionization in strong laser fields . Phys. Rev. A , 66 : 053415-1 – 7 .
   Google Scholar
• Haan , S. L. , Breen , L. , Karim , A. and Eberly , J. H. 2006 . Variable time lag and backward ejection in full-dimensional analysis of strong-field double ionization . Phys. Rev. Lett. , 97 : 103008-1 – 4 .
   Google Scholar
• P.J. Ho, Ph.D. diss., University of Rochester, 2007
   Google Scholar
• Sacha , K. and Eckhardt , B. 2001 . Pathways to double ionization of atoms in strong fields . Phys. Rev. A , 63 : 043414-1 – 9 . Nonsequential triple ionization in strong fields, ibid. 64 (2001), pp. 053401-1–8
   Google Scholar