. Références, Robertson and P. Sprangle. A review of free-electron lasers, Phys. Fluids B, vol.1, pp.3-43, 1989.

H. Wabnitz, L. Bittner, A. R. De-castro, R. Döhrmann, P. Gürtler et al., Multiple ionization of atom clusters by intense soft X-rays from a free-electron laser, Nature, vol.64, issue.6915, p.482, 2002.
DOI : 10.1038/nature01197

A. A. Sorokin, M. Wellhofer, S. V. Bobashev, K. Tiedtke, and M. Richter, X-ray-laser interaction with matter and the role of multiphoton ionization: Free-electron-laser studies on neon and helium, Physical Review A, vol.75, issue.5, p.75051402, 2007.
DOI : 10.1103/PhysRevA.75.051402

M. Hoeft, W. Martins, R. Wurth, J. Treusch, J. R. Feldhaus et al., Resonant two-photon absorption of extremeultraviolet free-electron-laser radiation in helium, Physical Review A (Atomic, Molecular, and Optical Physics, issue.5, p.75051406, 2007.

H. Mashiko, A. Suda, and K. Midorikawa, Focusing coherent soft-x-ray radiation to a micrometer spot size with an intensity of 10^14 W/cm^2, Optics Letters, vol.29, issue.16, pp.1927-1929, 2004.
DOI : 10.1364/OL.29.001927

H. Hasegawa, E. J. Takahashi, Y. Nabekawa, K. L. Ishikawa, and K. Midorikawa, Multiphoton ionization of he by using intense high-order harmonics in the soft-x-ray region, Physical Review A (Atomic, Molecular , and Optical Physics, issue.2, p.71023407, 2005.

D. B. Antoine, A. L. Milo?evi´milo?evi´c, M. B. Huillier, P. Gaarde, M. Salì et al., Generation of attosecond pulses in macroscopic media, Physical Review A, vol.56, issue.6, pp.4960-4969, 1997.
DOI : 10.1103/PhysRevA.56.4960

P. M. Paul, E. S. Toma, P. Berger, G. Mullot, F. Augé et al., Observation of a Train of Attosecond Pulses from High Harmonic Generation, Science, vol.292, issue.5522, p.2689, 2001.
DOI : 10.1126/science.1059413

URL : https://hal.archives-ouvertes.fr/hal-00523494

C. Iaconis and I. A. Walmsley, Spectral phase interferometry for direct electric-field reconstruction of ultrashort optical pulses, Optics Letters, vol.23, issue.10, pp.792-794, 1998.
DOI : 10.1364/OL.23.000792

J. Ullrich, R. Moshammer, R. Dörner, O. Jagutski, V. Mergel et al., Recoil-ion momentum spectroscopy, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, vol.61, issue.4, pp.2917-2974, 1997.
DOI : 10.1016/0168-583X(91)95315-5

D. B. Milosevic, G. G. Paulus, D. Bauer, and W. Becker, Above-threshold ionization by few-cycle pulses, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.39, issue.14, pp.203-262, 2006.
DOI : 10.1088/0953-4075/39/14/R01

L. V. Keldysh, Ionization in the field of a strong electromagnetic wave, Sov. Phys. JETP, vol.20, pp.1307-1314, 1965.

H. R. Reiss, Effect of an intense electromagnetic field on a weakly bound system, Physical Review A, vol.22, issue.5, pp.1786-1813, 1980.
DOI : 10.1103/PhysRevA.22.1786

M. V. Ammosov, N. B. Delone, V. P. Krainov, D. Bauer, and P. Mulser, Tunnel ionization of complex atoms and of atomic ions in an alternating electromagnetic field Exact field ionization rates in the barrier-suppression regime from numerical time-dependent schrödingerequation calculations, Sov. Phys. JETP Phys. Rev. A, vol.91, issue.591, pp.2008-2013569, 1986.

A. Becker and F. H. , -matrix theory, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.38, issue.3, pp.1-56, 2005.
DOI : 10.1088/0953-4075/38/3/R01

URL : https://hal.archives-ouvertes.fr/hal-00309521

A. De-bohan, B. Piraux, L. Ponce, R. Ta¨?ebta¨?eb, V. Véniard et al., Direct and Indirect Pathways in Strong Field Atomic Ionization Dynamics, Physical Review Letters, vol.89, issue.11, p.113002, 2002.
DOI : 10.1103/PhysRevLett.89.113002

M. Jain and N. Tzoar, Compton scattering in the presence of coherent electromagnetic radiation, Physical Review A, vol.18, issue.2, pp.538-545, 1978.
DOI : 10.1103/PhysRevA.18.538

G. Duchateau, E. Cormier, H. Bachau, and R. Gayet, Coulomb-Volkov approach of atom ionization by intense and ultrashort laser pulses, Physical Review A, vol.63, issue.5, p.53411, 2001.
DOI : 10.1103/PhysRevA.63.053411

G. Duchateau, E. Cormier, and R. Gayet, Coulomb-Volkov approach of ionization by extreme-ultraviolet laser pulses in the subfemtosecond regime, Physical Review A, vol.66, issue.2, p.23412, 2002.
DOI : 10.1103/PhysRevA.66.023412

V. D. Rodriguez, E. Cormier, and R. Gayet, Ionization by short uv laser pulses: Secondary above-threshold-ionization peaks of the electron spectrum investigated through a modified Coulomb-Volkov approach, Physical Review A, vol.69, issue.5, p.69053402, 2004.
DOI : 10.1103/PhysRevA.69.053402

D. Strickland and G. Mourou, Compression of amplified chirped optical pulses, Optics Communications, vol.56, issue.3, pp.219-221, 1985.
DOI : 10.1016/0030-4018(85)90120-8

M. Ferray, A. L. Huillier, X. F. Li, L. A. Lompré, G. Mainfray et al., Multiple-harmonic conversion of 1046 nm radiation in rare gases

A. Mcpherson, G. Gibson, H. Jara, U. Johann, T. S. Luk et al., Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gases, Journal of the Optical Society of America B, vol.4, issue.4, pp.595-601, 1987.
DOI : 10.1364/JOSAB.4.000595

G. S. Voronov and N. B. Delone, Many photon ionization of the xenon atom by ruby laser radiation, Sov. Phys. JETP, vol.23, pp.54-58, 1966.

L. A. Lompré, G. Mainfray, C. Manus, S. Repoux, and J. Thebault, Multiphoton ionization of rare gases at very high laser intensity (10 15 w/cm 2 ) by a 30-psec laser pulse at 1.06 µm, Phys. Rev. Lett, issue.16, pp.36949-952, 1976.

L. A. Lompré, G. Mainfray, C. Manus, and J. Thebault, Multiphoton ionization of rare gases by a tunable-wavelength 30-psec laser pulse at 1.06 ??m, Physical Review A, vol.15, issue.4, pp.1604-1612, 1977.
DOI : 10.1103/PhysRevA.15.1604

A. L. Huillier, L. A. Lompré, G. Mainfray, and C. Manus, Multiply Charged Ions Formed by Multiphoton Absorption Processes in the Continuum, Physical Review Letters, vol.48, issue.26, pp.1814-1817, 1982.
DOI : 10.1103/PhysRevLett.48.1814

A. L. Huillier, L. A. Lompré, G. Mainfray, and C. Manus, Multiply charged ions induced by multiphoton absorption processes in rare-gas atoms at 1.064??m, Journal of Physics B: Atomic and Molecular Physics, vol.16, issue.8, pp.1363-1381, 1983.
DOI : 10.1088/0022-3700/16/8/012

X. Tang, A. Lyras, and P. Lambropoulos, Dynamics of resonances rapidly shifting under short laser pulses, Physical Review Letters, vol.63, issue.9, pp.972-975, 1989.
DOI : 10.1103/PhysRevLett.63.972

X. Tang, H. Rudolph, and P. Lambropoulos, Nonperturbative approach to atomic multiphoton processes under intense, short laser pulses, Physical Review Letters, vol.65, issue.26, pp.3269-3272, 1990.
DOI : 10.1103/PhysRevLett.65.3269

P. Agostini, F. Fabre, G. Mainfray, G. Petite, and N. K. Rahman, Free-Free Transitions Following Six-Photon Ionization of Xenon Atoms, Physical Review Letters, vol.42, issue.17, pp.1127-1130, 1979.
DOI : 10.1103/PhysRevLett.42.1127

P. Kruit, J. Kimman, H. G. Muller, and M. J. Van, Electron spectra from multiphoton ionization of xenon at 1064, 532, and 355 nm, Physical Review A, vol.28, issue.1, pp.248-255, 1983.
DOI : 10.1103/PhysRevA.28.248

P. Agostini, J. Kupersztych, L. A. Lompré, G. Petite, and F. Yergeau, Direct evidence of ponderomotive effects via laser pulse duration in above-threshold ionization, Physical Review A, vol.36, issue.8, pp.364111-4114, 1987.
DOI : 10.1103/PhysRevA.36.4111

P. H. Bucksbaum, R. R. Freeman, M. Bashkansky, and T. J. Mcilrath, Role of the ponderomotive potential in above-threshold ionization, Journal of the Optical Society of America B, vol.4, issue.5, pp.760-764, 1987.
DOI : 10.1364/JOSAB.4.000760

H. G. Muller, P. Agostini, and C. Petite, Atoms in Intense Laser Fields, 1992.

E. Cormier, D. Garzella, P. Breger, P. Agostini, G. Chériaux et al., Above-threshold ionization contrast and channel closure in argon, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.34, issue.2, pp.9-17, 2001.
DOI : 10.1088/0953-4075/34/2/101

H. J. Humpert, H. Schwier, R. Hippler, and H. O. Lutz, Angular distribution of photoelectrons from above-threshold ionization of Xe, Physical Review A, vol.32, issue.6, pp.3787-3789, 1985.
DOI : 10.1103/PhysRevA.32.3787

G. Petite, P. Agostini, and H. G. Muller, Intensity dependence of nonperturbative above-threshold ionization spectra : experimental study

H. G. Muller, A. Tip, and M. J. Van, Ponderomotive force and AC Stark shift in multiphoton ionisation, Journal of Physics B: Atomic and Molecular Physics, vol.16, issue.22, pp.679-685, 1983.
DOI : 10.1088/0022-3700/16/22/001

Z. Deng and J. H. Eberly, Multiphoton absorption above ionization threshold by atoms in strong laser fields, Journal of the Optical Society of America B, vol.2, issue.3, pp.486-494, 1985.
DOI : 10.1364/JOSAB.2.000486

H. G. Muller and A. Tip, Multiphoton ionization in strong fields, Physical Review A, vol.30, issue.6, pp.3039-3050, 1984.
DOI : 10.1103/PhysRevA.30.3039

L. Pan, L. Jr, J. H. Armstrong, and . Eberly, Comments on the effect of the ponderomotive potential in the above-threshold ionization processes, Journal of the Optical Society of America B, vol.3, issue.10, pp.1319-1322, 1986.
DOI : 10.1364/JOSAB.3.001319

J. Morellec, D. Normand, and G. Petite, Resonance shifts in the multiphoton ionization of cesium atoms, Physical Review A, vol.14, issue.1, pp.300-312, 1976.
DOI : 10.1103/PhysRevA.14.300

R. R. Freeman, P. H. Bucksbaum, H. Milchberg, S. Darack, D. Schumacher et al., Above-threshold ionization with subpicosecond laser pulses, Physical Review Letters, vol.59, issue.10, pp.1092-1095, 1987.
DOI : 10.1103/PhysRevLett.59.1092

H. Rudolph, X. Tang, H. Bachau, P. Lambropoulos, and E. Cormier, Theory of intense-field ionization and above-threshold ionization of helium through multiple resonances, Physical Review Letters, vol.66, issue.25, pp.3241-3244, 1991.
DOI : 10.1103/PhysRevLett.66.3241

G. H. New and J. F. Ward, Optical Third-Harmonic Generation in Gases, Physical Review Letters, vol.19, issue.10, pp.556-559, 1967.
DOI : 10.1103/PhysRevLett.19.556

A. L. Huillier and P. Balcou, High-order harmonic generation in rare gases with a 1-ps 1053-nm laser, Physical Review Letters, vol.70, issue.6, pp.774-777, 1993.
DOI : 10.1103/PhysRevLett.70.774

T. Ditmire, E. T. Gumbrell, R. A. Smith, J. W. Tisch, D. D. Meyerhofer et al., Spatial Coherence Measurement of Soft X-Ray Radiation Produced by High Order Harmonic Generation, Physical Review Letters, vol.77, issue.23, pp.774756-4759, 1996.
DOI : 10.1103/PhysRevLett.77.4756

M. Bellini, C. Lyngå, A. Tozzi, M. B. Gaarde, T. W. Hänsch et al., Temporal Coherence of Ultrashort High-Order Harmonic Pulses, Physical Review Letters, vol.81, issue.2, pp.297-300, 1998.
DOI : 10.1103/PhysRevLett.81.297

S. Kazamias, D. Douillet, F. Weihe, C. Valentin, A. Rousse et al., Global Optimization of High Harmonic Generation, Physical Review Letters, vol.90, issue.19, p.90, 2003.
DOI : 10.1103/PhysRevLett.90.193901

URL : https://hal.archives-ouvertes.fr/hal-00523023

A. Za¨?rza¨?r, Production et caractérisation d'impulsions attosecondes VUV par génération d'harmoniques d'ordré elevé, 2006.

P. B. Corkum, Plasma perspective on strong field multiphoton ionization, Physical Review Letters, vol.71, issue.13, pp.1994-1997, 1993.
DOI : 10.1103/PhysRevLett.71.1994

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L. Huillier, and P. B. Corkum, Theory of high-harmonic generation by low-frequency laser fields, Physical Review A, vol.49, issue.3, pp.2117-2132, 1994.
DOI : 10.1103/PhysRevA.49.2117

G. G. Paulus, W. Nicklich, H. Xu, P. Lambropoulos, and H. Walther, Plateau in above threshold ionization spectra, Physical Review Letters, vol.72, issue.18, pp.2851-2854, 1994.
DOI : 10.1103/PhysRevLett.72.2851

B. Yang, K. J. Schafer, B. Walker, K. C. Kulander, P. Agostini et al., Intensity-dependent scattering rings in high order abovethreshold ionization, Phys. Rev. Lett, issue.23, pp.713770-3773, 1993.

D. Andrick and L. Langhans, -Ar scattering, Journal of Physics B: Atomic and Molecular Physics, vol.9, issue.15, pp.459-461, 1976.
DOI : 10.1088/0022-3700/9/15/006

A. Weingartshofer, J. K. Holmes, G. Caudle, E. M. Clarke, and H. Krüger, Direct Observation of Multiphoton Processes in Laser-Induced Free-Free Transitions, Physical Review Letters, vol.39, issue.5, pp.269-270, 1977.
DOI : 10.1103/PhysRevLett.39.269

N. M. Kroll and K. M. Watson, Charged-Particle Scattering in the Presence of a Strong Electromagnetic Wave, Physical Review A, vol.8, issue.2, pp.804-809, 1973.
DOI : 10.1103/PhysRevA.8.804

G. J. Pert, Inverse bremsstrahlung absorption in large radiation fields during binary collisions-classical theory, Journal of Physics A: General Physics, vol.5, issue.4, pp.506-516, 1972.
DOI : 10.1088/0305-4470/5/4/007

L. Schlessinger and J. Wright, Inverse-bremsstrahlung absorption rate in an intense laser field, Physical Review A, vol.20, issue.5, pp.1934-1945, 1979.
DOI : 10.1103/PhysRevA.20.1934

A. Brantov, W. Rozmus, R. Sydora, C. E. Capjack, V. Yu et al., Enhanced inverse bremsstrahlung heating rates in a strong laser field, Physics of Plasmas, vol.10, issue.8, pp.3385-3396, 2003.
DOI : 10.1063/1.1586917

K. C. Kulander, Multiphoton ionization of hydrogen: A time-dependent theory, Physical Review A, vol.35, issue.1, pp.445-447, 1987.
DOI : 10.1103/PhysRevA.35.445

J. Parker, K. T. Taylor, C. C. , and S. Blodgett-ford, Intense-field multiphoton ionization of a two-electron atom, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.29, issue.2, pp.33-42, 1996.
DOI : 10.1088/0953-4075/29/2/002

E. S. Smyth, J. S. Parker, and K. T. Taylor, Numerical integration of the time-dependent schrödinger equation for laser-driven helium scattering, Comp. Phys. Comm, vol.114, issue.1, 1998.

J. Zhang and P. Lambropoulos, Non-perturbative time-dependent theory and ATI in two electron atoms, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.28, issue.5, p.101, 1995.
DOI : 10.1088/0953-4075/28/5/001

E. Cormier and P. Lambropoulos, Above-threshold ionization spectrum of hydrogen using B-spline functions, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.30, issue.1, pp.77-91, 1997.
DOI : 10.1088/0953-4075/30/1/010

H. Bachau, E. Cormier, P. Decleva, J. E. Hansen, and F. Martin, -splines in atomic and molecular physics, Reports on Progress in Physics, vol.64, issue.12, pp.1815-1942, 2001.
DOI : 10.1088/0034-4885/64/12/205

URL : https://hal.archives-ouvertes.fr/hal-00004168

I. Bray and A. T. Stelbovics, Convergent close-coupling calculations of electron-hydrogen scattering, Physical Review A, vol.46, issue.11, pp.6995-7011, 1992.
DOI : 10.1103/PhysRevA.46.6995

A. S. Kheifets and I. Bray, Photoionization with excitation and double photoionization of the helium isoelectronic sequence, Physical Review A, vol.58, issue.6, pp.4501-4511, 1998.
DOI : 10.1103/PhysRevA.58.4501

A. S. Kheifets and I. Bray, Calculation of Circular Dichroism in Helium Double Photoionization, Physical Review Letters, vol.81, issue.21, pp.4588-4591, 1998.
DOI : 10.1103/PhysRevLett.81.4588

T. N. Rescigno, M. Baertschy, W. A. Isaacs, and C. W. Mccurdy, Collisional Breakup in a Quantum System of Three Charged Particles, Science, vol.286, issue.5449, p.2474, 1999.
DOI : 10.1126/science.286.5449.2474

T. N. Rescigno and C. W. Mccurdy, Numerical grid methods for quantum-mechanical scattering problems, Physical Review A, vol.62, issue.3, p.32706, 2000.
DOI : 10.1103/PhysRevA.62.032706

C. W. Mccurdy, D. A. Horner, T. N. Rescigno, and F. Martin, -spline implementation of exterior complex scaling, Physical Review A, vol.69, issue.3, p.69032707, 2004.
DOI : 10.1103/PhysRevA.69.032707

URL : https://hal.archives-ouvertes.fr/hal-00348283

M. Rotenberg, Application of sturmian functions to the Schroedinger three-body problem: Elastic e+-H scattering, Annals of Physics, vol.19, issue.2, pp.262-278, 1962.
DOI : 10.1016/0003-4916(62)90219-1

D. F. Gallaher and L. Wilets, Coupled-State Calculations of Proton-Hydrogen Scattering in the Sturmian Representation, Physical Review, vol.169, issue.1, pp.139-149, 1968.
DOI : 10.1103/PhysRev.169.139

R. Shakeshaft, +H scattering, Journal of Physics B: Atomic and Molecular Physics, vol.8, issue.7, pp.1114-1129, 1975.
DOI : 10.1088/0022-3700/8/7/017

B. Piraux and R. Shakeshaft, Norm of the wave function on a complex basis, Physical Review A, vol.49, issue.5, pp.3903-3908, 1994.
DOI : 10.1103/PhysRevA.49.3903

E. Huens, B. Piraux, A. Bugacov, and M. Gajda, Numerical studies of the dynamics of multiphoton processes with arbitrary field polarization: Methodological considerations, Physical Review A, vol.55, issue.3, pp.2132-2143, 1997.
DOI : 10.1103/PhysRevA.55.2132

G. Lagmago-kamta, B. Piraux, and A. Scrinzi, Configuration-interaction approach for high-lying singly and doubly excited states of two-electron systems, Physical Review A, vol.63, issue.4, p.40502, 2001.
DOI : 10.1103/PhysRevA.63.040502

S. Chu and J. Cooper, Threshold shift and above-threshold multiphoton ionization of atomic hydrogen in intense laser fields, Physical Review A, vol.32, issue.5, pp.2769-2775, 1985.
DOI : 10.1103/PhysRevA.32.2769

C. De-boor, A Pratical Guide to Splines, 1978.

E. Hairer, S. P. Norsett, and G. Wanner, Solving Ordinary Differential Equations I, 1993.
DOI : 10.1007/978-3-662-12607-3

E. Cormier, Etude théorique de l'interaction entre un systèmè a 1 ou 2 ´ electrons actifs dans un champ laser intense, 1994.

P. G. Burke, P. Francken, and C. J. Joachain, -matrix-Floquet theory of multiphoton processes, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.24, issue.4, pp.761-790, 1991.
DOI : 10.1088/0953-4075/24/4/005

URL : https://hal.archives-ouvertes.fr/in2p3-00025581

E. P. Wigner, Resonance Reactions and Anomalous Scattering, Physical Review, vol.70, issue.1-2, pp.15-33, 1946.
DOI : 10.1103/PhysRev.70.15

E. P. Wigner, Resonance Reactions, Physical Review, vol.70, issue.9-10, pp.606-618, 1946.
DOI : 10.1103/PhysRev.70.606

E. P. Wigner and L. Eisenbud, Higher Angular Momenta and Long Range Interaction in Resonance Reactions, Physical Review, vol.72, issue.1, pp.29-41, 1947.
DOI : 10.1103/PhysRev.72.29

G. Floquet, Sur leséquationsleséquations différentielles linéaireslinéairesà coefficients périodiques Annales scientifiques de l'E.N.S.2éme série, pp.47-88, 1883.

A. J. Siegert, On the Derivation of the Dispersion Formula for Nuclear Reactions, Physical Review, vol.56, issue.8, pp.750-752, 1939.
DOI : 10.1103/PhysRev.56.750

U. Fano, Stark effect of nonhydrogenic Rydberg spectra, Physical Review A, vol.24, issue.1, pp.619-622, 1981.
DOI : 10.1103/PhysRevA.24.619

M. Dörr, P. G. Burcke, C. J. Joachain, C. J. Noble, J. Purvis et al., R-matrix-Floquet theory of multiphoton processes. III. Multiphoton ionization of atomic hydrogen, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.26, issue.11, pp.275-280, 1993.
DOI : 10.1088/0953-4075/26/11/003

J. Purvis, M. Dörr, M. Terao-dunseath, C. J. Joachain, P. G. Burke et al., and He in intense laser fields, Physical Review Letters, vol.71, issue.24, pp.713943-3946, 1993.
DOI : 10.1103/PhysRevLett.71.3943

C. Mckenna, H. W. Van, and . Hart, Multiphoton ionization cross sections of neon and argon, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.37, issue.2, pp.457-470, 2004.
DOI : 10.1088/0953-4075/37/2/013

M. Madine, H. W. Van, and . Hart, Single- and two-photon ionization of Sr, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.38, issue.12, pp.1895-1905, 2005.
DOI : 10.1088/0953-4075/38/12/006

O. Latinne, N. J. Kylstra, M. Dörr, J. Purvis, M. Terao-dunseath et al., Laser-Induced Degeneracies Involving Autoionizing States in Complex Atoms, Physical Review Letters, vol.74, issue.1, pp.46-49, 1995.
DOI : 10.1103/PhysRevLett.74.46

E. Costa-i-bricha, C. L. Lewis, H. W. Van, and . Hart, Multiphoton ionization of ar 7+ in two color laser field usingr-matrix floquet theory

R. Gebarowski, P. G. Burke, K. T. Taylor, M. Dörr, M. Bensaid et al., R-matrix-floquet theory of multiphoton processes :x. theory of harmonic generation, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.30, issue.7, pp.1837-1846, 1997.
DOI : 10.1088/0953-4075/30/7/018

M. Terao-dunseath and K. M. Dunseath, -matrix Floquet theory for laser-assisted electron-atom scattering, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.35, issue.1, pp.125-140, 2002.
DOI : 10.1088/0953-4075/35/1/309

URL : https://hal.archives-ouvertes.fr/hal-01357678

P. Lambropoulos, Topics on Multiphoton Processes in Atoms, Ad. At. Mol. Phys, 1976.
DOI : 10.1016/S0065-2199(08)60043-3

J. H. Yee, Four-Photon Transition in Semiconductors, Physical Review B, vol.3, issue.2, pp.355-360, 1971.
DOI : 10.1103/PhysRevB.3.355

F. Adduci, I. M. Catalano, A. Cingolani, and A. Minafra, Direct and indirect two-photon processes in layered semiconductors, Physical Review B, vol.15, issue.2, pp.926-931, 1977.
DOI : 10.1103/PhysRevB.15.926

S. Augst, D. D. Meyerhofer, D. Strickland, and S. L. Chin, Laser ionization of noble gases by Coulomb-barrier suppression, Journal of the Optical Society of America B, vol.8, issue.4, pp.858-868, 1991.
DOI : 10.1364/JOSAB.8.000858

U. Mohideen, M. H. Sher, H. W. Tom, G. D. Aumiller, O. R. Wood et al., High intensity above-threshold ionization of He, Physical Review Letters, vol.71, issue.4, pp.509-512, 1993.
DOI : 10.1103/PhysRevLett.71.509

A. Szöke, Atomic and Molecular Processes with Short Intense Laser Pulses, 1987.

M. D. Perry, A. Szoke, O. L. Landen, and E. M. Campbell, Nonresonant multiphoton ionization of noble gases: Theory and experiment, Physical Review Letters, vol.60, issue.13, pp.1270-1273, 1988.
DOI : 10.1103/PhysRevLett.60.1270

J. Bauer, Comment on ???Theoretical studies of the long-range Coulomb potential effect on photoionization by strong lasers???, Physical Review A, vol.71, issue.6, p.71067401, 2005.
DOI : 10.1103/PhysRevA.71.067401

K. Mishima, M. Hayashi, J. Yi, S. H. Lin, H. L. Selzle et al., Generalization of Keldysh???s theory, Physical Review A, vol.66, issue.3, p.33401, 2002.
DOI : 10.1103/PhysRevA.66.033401

C. C. Chirila and R. M. Potvliege, Low-order above-threshold ionization in intense few-cycle laser pulses, Physical Review A, vol.71, issue.2, p.71021402, 2005.
DOI : 10.1103/PhysRevA.71.021402

A. M. Peremolov, V. S. Popov, and M. V. Terent-'ev, Ionization of atoms in an alternating electric field, Sov. Phys. JETP, vol.23, pp.924-935, 1966.

L. D. Landau and E. M. Lifshitz, Quantum Mechanics, 1978.

H. W. Van-der-hart, B. J. Doherty, J. S. Parker, and T. K. , Benchmark multiphoton ionization rates for he at 390 nm, J. Phys. B : At. Mol. Opt. Phys, vol.38, pp.207-214, 2005.

. Lin, Signatures of tunneling and multiphoton ionization in the electron-momentum distributions of atoms by intense few-cycle laser pulses, Physical Review A (Atomic, Molecular, and Optical Physics), vol.74, issue.4, p.41402, 2006.

G. Duchateau, Etude de l'ionisation d'atomes par des impulsions laser intenses et ultrabrèves, 2001.

T. Tajima and J. M. Dawson, Laser Electron Accelerator, Physical Review Letters, vol.43, issue.4, pp.267-270, 1979.
DOI : 10.1103/PhysRevLett.43.267

W. C. Henneberger, Perturbation Method for Atoms in Intense Light Beams, Physical Review Letters, vol.21, issue.12, pp.838-841, 1968.
DOI : 10.1103/PhysRevLett.21.838

H. R. Reiss and V. P. Krainov, Approximation for a Coulomb-Volkov solution in strong fields, Physical Review A, vol.50, issue.2, pp.910-912, 1994.
DOI : 10.1103/PhysRevA.50.R910

T. Brabec, M. Y. Ivanov, and P. B. Corkum, Coulomb focusing in intense field atomic processes, Physical Review A, vol.54, issue.4, pp.2551-2554, 1996.
DOI : 10.1103/PhysRevA.54.R2551

G. L. Yudin and M. Y. Ivanov, Physics of correlated double ionization of atoms in intense laser fields: Quasistatic tunneling limit, Physical Review A, vol.63, issue.3, p.33404, 2001.
DOI : 10.1103/PhysRevA.63.033404

S. Basile, F. Trombetta, G. Ferrante, R. Burlon, and C. Leone, Multiphoton ionization of hydrogen by a strong multimode field, Physical Review A, vol.37, issue.3, pp.1050-1052, 1988.
DOI : 10.1103/PhysRevA.37.1050

S. Basile, F. Trombetta, and G. Ferrante, Multiphoton multichannel ionisation of hydrogen with elliptically polarised light, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.21, issue.13, pp.377-382, 1988.
DOI : 10.1088/0953-4075/21/13/003

S. Basile, F. Trombetta, and G. Ferrante, Twofold Symmetric Angular Distributions in Multiphoton Ionization with Elliptically Polarized Light, Physical Review Letters, vol.61, issue.21, pp.612435-2437, 1988.
DOI : 10.1103/PhysRevLett.61.2435

P. Cavaliere, G. Ferrante, and C. Leone, Particle-atom ionising collisions in the presence of a laser radiation field, Journal of Physics B: Atomic and Molecular Physics, vol.13, issue.22, pp.4495-4507, 1980.
DOI : 10.1088/0022-3700/13/22/021

J. Banerji and M. H. Mittleman, Electron-atom ionising collisions in the presence of a low-frequency laser field, Journal of Physics B: Atomic and Molecular Physics, vol.14, issue.19, pp.3717-3725, 1981.
DOI : 10.1088/0022-3700/14/19/020

C. J. Joachain, P. Francken, A. Maquet, P. Martin, and V. Veniard, ) Collisions in the Presence of a Laser Field, Physical Review Letters, vol.61, issue.2, pp.165-168, 1988.
DOI : 10.1103/PhysRevLett.61.165

P. Martin, V. Veniard, A. Maquet, P. Francken, and C. J. Joachain, Electron-impact ionization of atomic hydrogen in the presence of a laser field, Physical Review A, vol.39, issue.12, pp.396178-6189, 1989.
DOI : 10.1103/PhysRevA.39.6178

X. J. Chen, ) collisions in the presence of a laser field, Physical Review A, vol.40, issue.4, pp.1795-1803, 1989.
DOI : 10.1103/PhysRevA.40.1795

J. Z. Kami´nskikami´nski, A. Jaro´njaro´n, and F. Ehlotzky, Coulomb effects in multiphoton above-threshold ionization, Physical Review A, vol.53, issue.3, pp.1756-1761, 1996.
DOI : 10.1103/PhysRevA.53.1756

D. B. Milo?evi´milo?evi´c and F. Ehlotzky, X-ray photoionization in the presence of a bichromatic laser field, Physical Review A, vol.57, issue.4, pp.2859-2866, 1998.
DOI : 10.1103/PhysRevA.57.2859

L. P. Presnyakov, H. Tawara, I. Y. Tolstikhina, and D. B. Uskov, Double ionization of atomic helium under heavy ion impact, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.28, issue.5, pp.785-793, 1995.
DOI : 10.1088/0953-4075/28/5/011

G. Duchateau and R. Gayet, Ionization of alkali-metal atoms by ultrashort laser pulses, Physical Review A, vol.65, issue.1, p.13405, 2001.
DOI : 10.1103/PhysRevA.65.013405

R. Guichard, H. Bachau, E. Cormier, R. Gayet, and V. D. Rodriguez, In-depth analysis of coulomb-volkov approaches to ionization and excitation by laser pulses, Phys. Scr, vol.76, pp.397-409, 2007.

R. Gayet, Renormalized Coulomb???Volkov approach to strong ionization by femtosecond laser pulses, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.38, issue.21, pp.3905-3916, 2005.
DOI : 10.1088/0953-4075/38/21/012

C. Eckart, The Theory and Calculation of Screening Constants, Physical Review, vol.36, issue.5, pp.878-892, 1930.
DOI : 10.1103/PhysRev.36.878

R. Guichard and R. Gayet, Approach to ionization by intense laser pulses through a reduced set of coupled state equations, Physical Review A, vol.74, issue.1, p.1402, 2006.
DOI : 10.1103/PhysRevA.74.011402

B. N. Yatsenko, H. Bachau, A. N. Belsky, J. Gaudin, G. Geoffroy et al., Creation of high energy electronic excitations in inorganicinsulators by intense femtosecond laser pulses, physica status solidi (c), vol.2, issue.1, pp.240-243, 2005.
DOI : 10.1002/pssc.200460155

A. Messiah, Quantum Mechanics, 2000.

S. H. Autler and C. H. Townes, Stark Effect in Rapidly Varying Fields, Physical Review, vol.100, issue.2, pp.703-722, 1955.
DOI : 10.1103/PhysRev.100.703

V. D. Rodriguez, Positronium ionization by short UV laser pulses: Splitting of the ATI peaks by Rabi oscillations, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, vol.247, issue.1, pp.105-111, 2006.
DOI : 10.1016/j.nimb.2006.01.045

K. C. Kulander, Time-dependent Hartree-Fock theory of multiphoton ionization: Helium, Physical Review A, vol.36, issue.6, pp.2726-2738, 1987.
DOI : 10.1103/PhysRevA.36.2726

M. S. Pindzola, D. C. Griffin, and C. Bottcher, Validity of time-dependent Hartree-Fock theory for the multiphoton ionization of atoms, Physical Review Letters, vol.66, issue.18, pp.2305-2307, 1991.
DOI : 10.1103/PhysRevLett.66.2305

M. S. Pindzola, P. Gavras, and T. W. Gorczyca, Time-dependent unrestricted Hartree-Fock theory for the multiphoton ionization of atoms, Physical Review A, vol.51, issue.5, pp.3999-4004, 1995.
DOI : 10.1103/PhysRevA.51.3999

B. Walker, B. Sheehy, L. F. Dimauro, P. Agostini, K. J. Schafer et al., Precision Measurement of Strong Field Double Ionization of Helium, Physical Review Letters, vol.73, issue.9, pp.1227-1230, 1994.
DOI : 10.1103/PhysRevLett.73.1227

D. N. Fittinghoff, P. R. Bolton, B. Chang, and K. C. Kulander, Observation of nonsequential double ionization of helium with optical tunneling, Physical Review Letters, vol.69, issue.18, pp.2642-2645, 1992.
DOI : 10.1103/PhysRevLett.69.2642

E. A. Hylleraas and J. Midtdal, Ground State Energy of Two-Electron Atoms, Physical Review, vol.103, issue.3, pp.829-830, 1956.
DOI : 10.1103/PhysRev.103.829

E. A. Hylleraas and J. Midtdal, Ground-State Energy of Two-Electron Atoms. Corrective Results, Physical Review, vol.109, issue.3, pp.1013-1014, 1958.
DOI : 10.1103/PhysRev.109.1013

T. Kinoshita, Ground State of the Helium Atom, Physical Review, vol.105, issue.5, pp.1490-1502, 1957.
DOI : 10.1103/PhysRev.105.1490

C. L. Pekeris, Ground State of Two-Electron Atoms, Physical Review, vol.112, issue.5, pp.1649-1658, 1958.
DOI : 10.1103/PhysRev.112.1649

J. N. Silverman, O. Platas, and F. A. Matsen, Simple Configuration???Interaction Wave Functions. I. Two???Electron Ions: A Numerical Study, The Journal of Chemical Physics, vol.32, issue.5, pp.1402-1406, 1960.
DOI : 10.1063/1.1730930

C. Schwartz, Ground State of the Helium Atom, Physical Review, vol.128, issue.3, pp.1146-1148, 1962.
DOI : 10.1103/PhysRev.128.1146

F. W. Byron and C. J. Joachain, Correlation Effects in Atoms. I. Helium, Physical Review, vol.146, issue.1, pp.1-8, 1966.
DOI : 10.1103/PhysRev.146.1

F. W. Byron and C. J. Joachain, Correlation Effects in Atoms. II. Angular Correlations between Electrons, Physical Review, vol.157, issue.1, pp.1-6, 1967.
DOI : 10.1103/PhysRev.157.1

F. W. Byron and C. J. Joachain, Correlation Effects in Atoms. III. Four-Electron Systems, Physical Review, vol.157, issue.1, p.7, 1967.
DOI : 10.1103/PhysRev.157.7

T. A. Carlson, Double Electron Ejection Resulting from Photo-Ionization in the Outermost Shell of He, Ne, and Ar, and Its Relationship to Electron Correlation, Physical Review, vol.156, issue.1, pp.142-149, 1967.
DOI : 10.1103/PhysRev.156.142

R. L. Brown, Double Photoionization of Helium, Physical Review A, vol.1, issue.3, pp.586-590, 1970.
DOI : 10.1103/PhysRevA.1.586

E. A. Hylleraas, Neue Berechnung der Energie des Heliums im Grundzustande, sowie des tiefsten Terms von Ortho-Helium, Zeitschrift f???r Physik, vol.54, issue.5-6, p.347, 1929.
DOI : 10.1007/BF01375457

J. S. Briggs and V. Schmidt, Differential cross sections for photo-double-ionization of the helium atom, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.33, issue.1, pp.1-48, 2000.
DOI : 10.1088/0953-4075/33/1/201

D. Proulx and R. Shakeshaft, Double ionization of helium by a single photon with energy 89???140 eV, Physical Review A, vol.48, issue.2, pp.875-878, 1993.
DOI : 10.1103/PhysRevA.48.R875

M. Pont and R. Shakeshaft, Absolute triply differential cross sections for double photoionization of helium at 10, 20, and 52.9 eV above threshold, Physical Review A, vol.51, issue.4, pp.2676-2679, 1995.
DOI : 10.1103/PhysRevA.51.R2676

F. Maulbetsch and J. S. Briggs, Angular distribution of electrons following double photoionization, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.26, issue.11, pp.1679-1696, 1993.
DOI : 10.1088/0953-4075/26/11/005

F. Maulbetsch and J. S. Briggs, The angular distribution of equal-energy electrons following double photoionization, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.26, issue.19, pp.647-652, 1993.
DOI : 10.1088/0953-4075/26/19/003

F. Maulbetsch and J. S. Briggs, Double photoionization in the case of unequal energy sharing, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.27, issue.18, pp.4095-4104, 1994.
DOI : 10.1088/0953-4075/27/18/009

F. Maulbetsch, M. Pont, J. S. Briggs, and R. Shakeshaft, Angular distributions for double photoionization of helium: a comparative study, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.28, issue.10
DOI : 10.1088/0953-4075/28/10/003

M. Brauner, J. S. Briggs, and H. Klar, Triply-differential cross sections for ionisation of hydrogen atoms by electrons and positrons, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.22, issue.14, pp.2265-2287, 1989.
DOI : 10.1088/0953-4075/22/14/010

S. Jetzke and F. H. , Coulomb correlations in electron and positron impact ionization of hydrogen at intermediate and higher energies, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.25, issue.7
DOI : 10.1088/0953-4075/25/7/024

M. Pont, R. Shakeshaft, F. Maulbetsch, and J. S. Briggs, Angular distributions for double photoionization of helium: Discrepancies between theory and experiment, Physical Review A, vol.53, issue.5, pp.3671-3674, 1996.
DOI : 10.1103/PhysRevA.53.3671

A. Huetz, P. Lablanquie, L. Andric, P. Selles, and J. Mazeau, Multicoincidence measurements of double photoionization in helium, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.27, issue.1, pp.13-18, 1994.
DOI : 10.1088/0953-4075/27/1/003

A. S. Kheifets and I. Bray, Calculation of double photoionization of helium using the convergent close-coupling method, Physical Review A, vol.54, issue.2, pp.995-997, 1996.
DOI : 10.1103/PhysRevA.54.R995

A. S. Kheifets and I. Bray, Application of the CCC method to the calculation of helium double-photoionization triply differential cross sections, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.31, issue.10, pp.447-453, 1998.
DOI : 10.1088/0953-4075/31/10/002

L. A. Nikolopoulos and P. Lambropoulos, Multichannel theory of two-photon single and double ionization of helium, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.34, issue.4, pp.545-564, 2001.
DOI : 10.1088/0953-4075/34/4/304

L. A. Nikolopoulos and P. Lambropoulos, Time-dependent theory of double ionization of helium under XUV radiation, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.40, issue.7, pp.1347-1357, 2007.
DOI : 10.1088/0953-4075/40/7/004

G. H. Wannier, The Threshold Law for Single Ionization of Atoms or Ions by Electrons, Physical Review, vol.90, issue.5, pp.817-825, 1953.
DOI : 10.1103/PhysRev.90.817

A. K. Kazansky and V. N. Ostrovsky, Energy sharing and angular distribution in the double photoionization of helium, Physical Review A, vol.51, issue.5, pp.3698-3702, 1995.
DOI : 10.1103/PhysRevA.51.3698

A. K. Kazansky and V. N. Ostrovsky, Wannier-ridge theory of angular distribution, Physical Review A, vol.51, issue.5, pp.3712-3717, 1995.
DOI : 10.1103/PhysRevA.51.3712

A. K. Kazansky and V. N. Ostrovsky, Electron correlation in double photoionization: Comparative study of secondary structure for Ne and Xe, Physical Review A, vol.52, issue.2, pp.1775-1778, 1995.
DOI : 10.1103/PhysRevA.52.1775

J. M. Feagin, Fourth-order Wannier threshold theory, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.28, issue.8, pp.1495-1516, 1995.
DOI : 10.1088/0953-4075/28/8/013

J. M. Feagin, Recoil-ion angular distributions following double photoionization, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.29, issue.15, pp.551-559, 1996.
DOI : 10.1088/0953-4075/29/15/001

C. Bouri, P. Selles, M. Malegat, J. M. Teuler, M. K. Njock et al., Dynamics of the helium atom close to the full fragmentation threshold: Ionization excitation, Physical Review A, vol.72, issue.4, p.42716, 2005.
DOI : 10.1103/PhysRevA.72.042716

URL : https://hal.archives-ouvertes.fr/hal-00116662

C. Bouri, P. Selles, L. Malegat, and M. G. Njock, Dynamics of the helium atom close to the full fragmentation threshold: Double ionization, Physical Review A, vol.73, issue.2, p.73022724, 2006.
DOI : 10.1103/PhysRevA.73.022724

URL : https://hal.archives-ouvertes.fr/hal-00263573

C. Bouri, P. Selles, L. Malegat, and M. G. Njock, Parabolic versus spherical partial cross sections for photoionization excitation of He near threshold, Physical Review A, vol.74, issue.3, p.74032704, 2006.
DOI : 10.1103/PhysRevA.74.032704

URL : https://hal.archives-ouvertes.fr/hal-00263575

O. Schwarzkopf, B. Krässig, J. Elmiger, and V. Schmidt, Energy- and angle-resolved double photoionization in helium, Physical Review Letters, vol.70, issue.20, pp.3008-3011, 1993.
DOI : 10.1103/PhysRevLett.70.3008

O. Schwarzkopf, B. Krässig, V. Schmidt, M. Maulbetsch, and J. S. Briggs, Unequal energy sharing in the angle-resolved double photoionization cross section of helium, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.27, issue.14, pp.347-350, 1994.
DOI : 10.1088/0953-4075/27/14/008

P. Lablanquie, J. Mazeau, L. Andric, P. Selles, and A. Huetz, Effect of Electron Energy Sharing on the Double Photoionization of Helium Near Threshold, Physical Review Letters, vol.74, issue.12, pp.2192-2195, 1995.
DOI : 10.1103/PhysRevLett.74.2192

R. Dörner, H. Bräuning, J. M. Feagin, V. Mergel, O. Jagutzki et al., Photo-double-ionization of He: Fully differential and absolute electronic and ionic momentum distributions, Physical Review A, vol.57, issue.2, pp.1074-1090, 1998.
DOI : 10.1103/PhysRevA.57.1074

H. Bräuning, R. Dörner, C. L. Cocke, M. H. Prior, B. Krässig et al., Absolute triple differential cross sections for photo-double ionization of helium - experiment and theory, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.31, issue.23, pp.5149-5160, 1998.
DOI : 10.1088/0953-4075/31/23/012

A. Knapp, A. Kheifets, I. Bray, . Th, A. L. Weber et al., Mechanisms of Photo Double Ionization of Helium by 530 eV Photons, Physical Review Letters, vol.89, issue.3, p.33004, 2002.
DOI : 10.1103/PhysRevLett.89.033004

A. Knapp, A. Kheifets, I. Bray, . Th, A. L. Weber et al., Photo double ionization of helium 100 eV and 450 eV above threshold: I. Linearly polarized light, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.38, issue.6, pp.615-633, 2005.
DOI : 10.1088/0953-4075/38/6/001

J. Colgan and M. S. Pindzola, Core-Excited Resonance Enhancement in the Two-Photon Complete Fragmentation of Helium, Physical Review Letters, vol.88, issue.17, p.173002, 2002.
DOI : 10.1103/PhysRevLett.88.173002

L. Feng, H. W. Van, and . Hart, Two-photon double ionization of He, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.36, issue.1, pp.1-7, 2003.
DOI : 10.1088/0953-4075/36/1/101

B. Piraux, J. Bauer, S. Laulan, and H. Bachau, Probing electron-electron correlation with attosecond pulses, The European Physical Journal D - Atomic, Molecular and Optical Physics, vol.26, issue.1, pp.7-13, 2003.
DOI : 10.1140/epjd/e2003-00063-3

S. X. Hu, J. Colgan, and L. A. Collins, Triple-differential cross-sections for two-photon double ionization of He near threshold, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.38, issue.1, pp.38-73, 2005.
DOI : 10.1088/0953-4075/38/1/L05

E. Foumouo, G. Lagmago-kamta, G. Edah, and B. Piraux, treatment, Physical Review A, vol.74, issue.6, p.74063409, 2006.
DOI : 10.1103/PhysRevA.74.063409

A. S. Kheifets and I. A. Ivanov, Convergent close-coupling calculations of two-photon double ionization of helium, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.39, issue.7, pp.1731-1742, 2006.
DOI : 10.1088/0953-4075/39/7/015

I. A. Ivanov and A. S. Kheifets, Two-photon double ionization of helium in the region of photon energies 42?50 ev, Physical Review A (Atomic, Molecular, and Optical Physics), issue.3, p.75033411, 2007.

R. Dörner, H. Schmidt-böcking, T. Weber, T. Jahnke, M. Schlöffer et al., Double ionization by one and many photons, Radiation Physics and Chemistry, vol.70, issue.1-3, pp.191-206, 2004.
DOI : 10.1016/j.radphyschem.2003.12.012

J. A. Samson, Proportionality of electron-impact ionization to double photoionization, Physical Review Letters, vol.65, issue.23, pp.2861-2864, 1990.
DOI : 10.1103/PhysRevLett.65.2861

A. S. Kheifets, A. Ipatov, M. Arifin, and I. Bray, states, Physical Review A, vol.62, issue.5, p.52724, 2000.
DOI : 10.1103/PhysRevA.62.052724

T. Schneider, P. L. Chocian, and J. M. Rost, Separation and Identification of Dominant Mechanisms in Double Photoionization, Physical Review Letters, vol.89, issue.7, p.73002, 2002.
DOI : 10.1103/PhysRevLett.89.073002

D. Proulx, R. Teng, and Z. Shakeshaft, Super-Intense Laser-Atom Physics, 1993.

M. Pont and R. Shakeshaft, Absolute cross sections for double photoionization of helium at energies from 0 to 80 eV above threshold, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.28, issue.18, pp.571-577, 1995.
DOI : 10.1088/0953-4075/28/18/001

M. R. Rudge and M. J. Seaton, Ionization of Atomic Hydrogen by Electron Impact, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.283, issue.1393, pp.262-290, 1965.
DOI : 10.1098/rspa.1965.0020

R. K. Peterkop, Asymptotic behavior of charged particle wave functions, Sov. Phys. JETP, vol.16, pp.442-444, 1963.

H. Ehrhardt, G. Knoth, P. Schlemmer, and K. Jung, Absolute H(e, 2e)p cross section measurements: Comparison with first and second order theory, Physics Letters A, vol.110, issue.2, pp.92-95, 1985.
DOI : 10.1016/0375-9601(85)90326-3

H. Bräuning, R. Dörner, C. L. Cocke, M. H. Prior, B. Krässig et al., Recoil ion and electronic angular asymmetry parameters for photo double ionization of helium at 99 eV, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.30, issue.19, pp.649-655, 1997.
DOI : 10.1088/0953-4075/30/19/004

S. Laulan, Etude des atomes d'hélium et de béryllium en champ laser bref et intense, 2004.

V. Achler, M. Mergel, L. Spielberger, R. Dörner, Y. Azuma et al., Photo double ionization of He by circular and linear polarized single-photon absorption, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.34, issue.6, pp.965-981, 2001.
DOI : 10.1088/0953-4075/34/6/301

J. Bauer and K. Rzazewski, SFA applied to the nonsequential double ionization of the helium atom by a circularly polarized plane wave, Journal of Physics B: Atomic, Molecular and Optical Physics, vol.29, issue.15, pp.3351-3362, 1996.
DOI : 10.1088/0953-4075/29/15/010

A. Nordsieck, Reduction of an Integral in the Theory of Bremsstrahlung, Physical Review, vol.93, issue.4, pp.785-787, 1954.
DOI : 10.1103/PhysRev.93.785