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1

Hafliðason, Arnar, Pavle Glodic, Greta Koumarianou, Peter C. Samartzis, and Ágúst Kvaran. "Multiphoton Rydberg and valence dynamics of CH3Br probed by mass spectrometry and slice imaging." Physical Chemistry Chemical Physics 20, no. 25 (2018): 17423–33. http://dx.doi.org/10.1039/c8cp02350f.

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2

Matthíasson, Kristján, Greta Koumarianou, Meng-Xu Jiang, Pavle Glodic, Peter C. Samartzis, and Ágúst Kvaran. "Formation of highly excited iodine atoms from multiphoton excitation of CH3I." Physical Chemistry Chemical Physics 22, no. 9 (2020): 4984–92. http://dx.doi.org/10.1039/c9cp06242d.

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3

KARULE, ERNA. "Multiphoton Ionization." International Journal of Modern Physics C 02, no. 01 (1991): 387–90. http://dx.doi.org/10.1142/s0129183191000548.

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Multiphoton ionization happens in an intense light beam when atoms absorb more than one photon. In strong fields an atom may absorb not only the minimum energetically necessary number of photons for ionization, but also excess photons. The last process is the so called “above threshold ionization” (ATI) which as well as “normal” multiphoton ionization (MPI) takes place in the strong laser fields. Both processes are between those responsible for the energy transfer from the laser to the plasma. The paper deals with the quantum mechanical calculation of MPI and ATI of atomic hydrogen. At the mod
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4

Mah, K. R., F. W. Dalby, and C. W. Barnard. "Polarization dependence of resonant multiphoton ionizations on 1S0 and 1,3D2 states in atomic mercury." Canadian Journal of Physics 66, no. 1 (1988): 1–6. http://dx.doi.org/10.1139/p88-001.

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The polarization dependences of some resonant multiphoton ionizations in atomic mercury have been measured with a broadband (bandwidth ≈ 1.5 cm−1) multimode dye laser at moderate light intensities (≈ 500 MW∙cm−2). The multiphoton processes studied were the absorption of four photons to a resonant 1S0, 1D2, or 3D2 level by one-photon ionization. Complete saturation of the one-photon ionization step results in the ionization of all atoms excited to the resonant level. Because of the saturation of the ionization step, the polarization dependence of the four-photon excitation to the resonant level
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5

Peet, V. "Triggered multiphoton ionization." Journal of Physics B: Atomic, Molecular and Optical Physics 39, no. 18 (2006): 3733–37. http://dx.doi.org/10.1088/0953-4075/39/18/003.

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6

Baik, Moon-Gu, Marcel Pont, and Robin Shakeshaft. "Multiphoton ionization ofH2+." Physical Review A 54, no. 2 (1996): 1570–76. http://dx.doi.org/10.1103/physreva.54.1570.

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7

Scharf, G., K. Sonnenmoser, and W. F. Wreszinski. "Sensitive multiphoton ionization." Physical Review A 44, no. 5 (1991): 3250–65. http://dx.doi.org/10.1103/physreva.44.3250.

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8

Bogatskaya, Anna, Yulia Gulina, Nikita Smirnov, Ilia Gritsenko, Sergey Kudryashov, and Alexander Popov. "An Experimental Study of Multiphoton Ionization in Fused Silica at IR and Visible Wavelengths." Photonics 10, no. 5 (2023): 515. http://dx.doi.org/10.3390/photonics10050515.

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We present the results of an experimental study of multiphoton ionization in fused silica, using a linearly polarized femtosecond Satsuma fiber laser with an active medium based on Yb+3 ions, at 515 -nm and 1030 -nm wavelengths. The radiation transmission in the fused silica was measured as a function of the laser intensity and wavelength and the data were analyzed using a theoretical model based on the Keldysh theory. We determined the multiphoton absorption cross-sections in the fused silica in the case of four- and eight-photon ionization and analyzed the contribution of avalanche ionizatio
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9

Knight, P. L. "Multiphoton Ionization of Atoms." Optica Acta: International Journal of Optics 32, no. 3 (1985): 264. http://dx.doi.org/10.1080/713821734.

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10

Mainfray, G., and G. Manus. "Multiphoton ionization of atoms." Reports on Progress in Physics 54, no. 10 (1991): 1333–72. http://dx.doi.org/10.1088/0034-4885/54/10/002.

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11

Georgiadis, R., and P. B. Armentrout. "Multiphoton ionization of VOCl3." Chemical Physics Letters 137, no. 2 (1987): 144–48. http://dx.doi.org/10.1016/0009-2614(87)80320-2.

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12

Rhodes, C. K. "Multiphoton Ionization of Atoms." Science 229, no. 4720 (1985): 1345–51. http://dx.doi.org/10.1126/science.229.4720.1345.

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13

Mainfray, G. "MULTIPHOTON IONIZATION OF ATOMS." Le Journal de Physique Colloques 46, no. C1 (1985): C1–113—C1–125. http://dx.doi.org/10.1051/jphyscol:1985111.

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14

Wei Menghao, Li Xing, Luo Sizuo, He Lanhai, and Dajun Ding. "The ionization time-delay in atoms and molecules detected through strong-field multiphoton transition interferometry." Acta Physica Sinica 74, no. 15 (2025): 0. https://doi.org/10.7498/aps.74.20250647.

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Attosecond ionization dynamics, as a key research direction in ultrafast science, relies critically on breakthroughs in both experimental techniques and theoretical models to reveal the fundamental processes underlying ultrafast matter evolution. Among the cutting-edge approaches in this field, the strong-field multiphoton transition interferometry (SFMPTI) method stands out for its ability to achieve attosecond time-resolved probing of multiphoton ionization dynamics via quantum path interference. This technique has been widely applied to attosecond-scale measurements and characterizations of
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15

Хайрулин, И. Р., В. А. Антонов, М. Ю. Емелин, М. М. Попова, Е. В. Грызлова та М. Ю. Рябикин. "Многоуровневая модель многофотонных процессов в атоме гелия в сильном лазерном поле: учет ионизации". Оптика и спектроскопия 131, № 2 (2023): 136. http://dx.doi.org/10.21883/os.2023.02.54994.5-23.

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A multilevel model that makes it possible to describe multiphoton processes taking into account ionization in a multielectron atom irradiated by an intense laser field is proposed. Using the He atom as an example, it is shown that this model reproduces the main regularities of multiphoton ionization of an atom by an intense high-frequency laser field.
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16

Niles, Stanley, P. B. Armentrout, and Charles A. Wight. "Laser multiphoton dissociation and multiphoton ionization of VOCl3." Chemical Physics 165, no. 1 (1992): 143–46. http://dx.doi.org/10.1016/0301-0104(92)80051-v.

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17

Hafliðason, Arnar, Pavle Glodic, Greta Koumarianou, Peter C. Samartzis, and Ágúst Kvaran. "Two-color studies of CH3Br excitation dynamics with MPI and slice imaging." Physical Chemistry Chemical Physics 21, no. 20 (2019): 10391–401. http://dx.doi.org/10.1039/c8cp06376a.

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18

Hafliðason, Arnar, Meng-Xu Jiang, and Ágúst Kvaran. "High energy Rydberg and ion-pair states, state mixing and excitation dynamics of HI." Physical Chemistry Chemical Physics 21, no. 41 (2019): 23154–61. http://dx.doi.org/10.1039/c9cp04872c.

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19

Miladinović, T. B., S. Simić, and N. Danilović. "Ionization transition rates in the intermediate regime of the Keldysh parameter for a (0,1)*LG spiral amplitude modulated laser field." Журнал экспериментальной и теоретической физики 163, no. 6 (2023): 779–85. http://dx.doi.org/10.31857/s0044451023060020.

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The mechanisms of the tunnel and multiphoton ionization transitions of hydrogen-like atoms and noble gas atoms are discussed. Atoms potassium and argon, with ionization energy of 4.34 and 15.76 eV, were chosen as the target. The atoms are exposed to Ti:Sapphire, (0,1)*LG, spiral amplitude modulated, laser beam at λ = 800 nm wavelength in a broad intensity range 1012 to 1015 W/cm2. The computational approach to describe tunnel and multiphoton processes was based on using the ADK theory. Stark and ponderomotive effects are also included to study their influence on the transition rate. Obtained r
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20

Ehlotzky, F. "Laser-induced Compton scattering from a bound electron." Canadian Journal of Physics 70, no. 1 (1992): 72–77. http://dx.doi.org/10.1139/p92-007.

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We investigate nonrelativistically Compton scattering by an electron bound in hydrogen in a powerful laser field. The corresponding nonlinear rates and cross sections are evaluated in a Keldysh-type of approximation and compared with the rates and cross sections of multiphoton ionization and harmonic generation. We find that multiphoton ionization overshadows Compton scattering by many orders of magnitude, however, Compton scattering may well compete with harmonic generation above the ionization threshold, since, in particular, both processes have the same angular distribution and only odd har
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21

Jones, R. R., Y. Zhu, U. Eichmann, and T. F. Gallagher. "Multiphoton double ionization of barium." IEEE Transactions on Plasma Science 16, no. 5 (1988): 534–40. http://dx.doi.org/10.1109/27.8961.

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22

Åberg, T. "Quantum electrodynamics of multiphoton ionization." Physica Scripta T46 (January 1, 1993): 173–81. http://dx.doi.org/10.1088/0031-8949/1993/t46/026.

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23

Pont, Marcel, R. M. Potvliege, Robin Shakeshaft, and Philip H. G. Smith. "Geometric phases in multiphoton ionization." Physical Review A 46, no. 1 (1992): 555–66. http://dx.doi.org/10.1103/physreva.46.555.

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24

Paquet, E., and S. L. Chin. "Fractal geometry and multiphoton ionization." Journal of Physics B: Atomic, Molecular and Optical Physics 24, no. 23 (1991): L579—L582. http://dx.doi.org/10.1088/0953-4075/24/23/004.

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25

Ashfold, M. N. R., R. J. Stickland, and B. Tutcher. "Multiphoton ionization spectroscopy of phosphine." Molecular Physics 65, no. 6 (1988): 1455–71. http://dx.doi.org/10.1080/00268978800101921.

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26

Hansch, P., M. A. Walker, and L. D. Van Woerkom. "Spatially dependent multiphoton multiple ionization." Physical Review A 54, no. 4 (1996): R2559—R2562. http://dx.doi.org/10.1103/physreva.54.r2559.

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27

Talebpour, A., S. Larochelle, and S. L. Chin. "Multiphoton ionization of unsaturated hydrocarbons." Journal of Physics B: Atomic, Molecular and Optical Physics 31, no. 12 (1998): 2769–76. http://dx.doi.org/10.1088/0953-4075/31/12/012.

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28

Rottke, H., C. Trump, and W. Sandner. "Multiphoton ionization and dissociation of." Journal of Physics B: Atomic, Molecular and Optical Physics 31, no. 5 (1998): 1083–96. http://dx.doi.org/10.1088/0953-4075/31/5/015.

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29

Liu, Benkang, Yanqiu Wang, and Li Wang. "Femtosecond Multiphoton Ionization of Pyrrole." Journal of Physical Chemistry A 116, no. 1 (2011): 111–18. http://dx.doi.org/10.1021/jp209211s.

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30

Story, J. G., D. I. Duncan, and T. F. Gallagher. "Resonant inhibition of multiphoton ionization." Physical Review Letters 70, no. 20 (1993): 3012–15. http://dx.doi.org/10.1103/physrevlett.70.3012.

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31

Ding, D., R. N. Compton, R. E. Haufler, and C. E. Klots. "Multiphoton ionization of fullerene (C60)." Journal of Physical Chemistry 97, no. 11 (1993): 2500–2504. http://dx.doi.org/10.1021/j100113a006.

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32

Trump, C., H. Rottke, and W. Sandner. "Multiphoton ionization of dissociatingD2+molecules." Physical Review A 59, no. 4 (1999): 2858–63. http://dx.doi.org/10.1103/physreva.59.2858.

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33

Spotts, J. M., C. K. Wong, M. S. Johnson, et al. "Multiphoton Ionization Spectroscopy of AlArNClusters†." Journal of Physical Chemistry A 107, no. 36 (2003): 6948–65. http://dx.doi.org/10.1021/jp030399o.

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34

Harrison, W. W., D. M. Rider, and R. N. Zare. "Multiphoton ionization studies of iron." International Journal of Mass Spectrometry and Ion Processes 65, no. 1-2 (1985): 59–68. http://dx.doi.org/10.1016/0168-1176(85)85053-9.

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35

Allendorf, Sarah W., and Abraham Szöke. "High-intensity multiphoton ionization ofH2." Physical Review A 44, no. 1 (1991): 518–34. http://dx.doi.org/10.1103/physreva.44.518.

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36

Belbruno, Joseph J. "Multiphoton ionization and chemical dynamics." International Reviews in Physical Chemistry 14, no. 1 (1995): 67–84. http://dx.doi.org/10.1080/01442359509353304.

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37

Ke-jian, Fu, Whetten R. L, and Grant E. R. "Multiphoton ionization spectrum of toluene." Chinese Physics Letters 2, no. 1 (1985): 19–22. http://dx.doi.org/10.1088/0256-307x/2/1/006.

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38

Armstrong, D. P., D. A. Harkins, R. N. Compton, and D. Ding. "Multiphoton ionization of uranium hexafluoride." Journal of Chemical Physics 100, no. 1 (1994): 28–43. http://dx.doi.org/10.1063/1.467270.

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39

Gulmira, Teshaboeva Ma'mirjon qizi, and Abdulfayzovich Ermatov Shukrulla. "TUNNEL EFFECT IN THE FIELD OF LASER RADIATION." EURASIAN JOURNAL OF MEDICAL AND NATURAL SCIENCES 2, no. 2 (2022): 150–53. https://doi.org/10.5281/zenodo.6344797.

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The paper describes the process of ionization of an atom in the field of laser radiation. To describe the tunnel breakdown mechanism, the Keldysh-Faisal-Ries models can be applied. The ionization of an atom in a constant field is considered as multiphoton absorption
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40

Kirin, I. G. "Laboratory work «Study of multiphoton ionization under conditions of resonant excitation of atomic vapors»." Educational Physics, no. 3 (2024): 31–41. http://dx.doi.org/10.62957/2307-5457-2024-3-31-41.

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The developed laboratory work is described, designed to study multiphoton ionization under conditions of resonant excitation of atomic vapors by frequency-tunable laser radiation. Atomic pairs of potassium and rubidium were chosen as objects of study. To demonstrate the resonant nature of multiphoton ionization, the results of studies of the dependence of the magnitude of the ion signal on the frequency of laser radiation causing this signal are presented. Analytical expressions are given to describe the experimentally observed patterns of resonant ionization processes. Laboratory work is part
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41

Yang, Qin, Jing Leng, Yan-Hui Wang, et al. "Identification of Above-Threshold Ionization by Imaging Photoelectrons from Ammonia Molecules in an Intense Femtosecond Laser Field." Chinese Physics Letters 39, no. 2 (2022): 023301. http://dx.doi.org/10.1088/0256-307x/39/2/023301.

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The above-threshold ionization process of ammonia molecules induced by a femtosecond laser field at 800 nm is studied in the intensity range from 1.6 × 1013 to 5.7 × 1013 W/cm2. Channel switching under different laser intensities is observed and identified in the photoelectron kinetic energy spectra of ammonia. Based on the photoelectron kinetic energy distributions and the photoelectron angular distributions, the characteristic peaks observed are exclusively assigned to the multiphoton resonance through certain intermediate states, followed by multiphoton above-threshold ionization.
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42

Kouno, Hiroaki, and Totaro Imasaka. "The efficiencies of resonant and nonresonant multiphoton ionization in the femtosecond region." Analyst 141, no. 18 (2016): 5274–80. http://dx.doi.org/10.1039/c6an00577b.

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43

Cisneros, C., T. Bautista, C. F. Betancourt, E. Prieto, A. Guerrero, and I. Álvarez. "Formic Acid Ionization and Fragmentation by Multiphoton Absorption." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 8, no. 2 (2021): 197–201. http://dx.doi.org/10.15415/jnp.2021.82026.

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Multiphoton absorption is an intensity dependent nonlinear effect related to the excitation of virtual intermediate states. In the present work, multiphoton ionization and dissociation of the formic acid molecule (HCOOH) by the interaction with photons from 532 Nd: YAG laser at different intensities are discussed, using different carrier gases. The induced fragmentation-ionization patterns show up to 17 fragments and dissociation channels are proposed. Some evidence of small clusters formation and conformational memory from the ratio of the detected products, CO+ and CO2+, on the light of the
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44

Moïse Dikandé, Alain. "Soliton trains induced by femtosecond laser filamentations in transparent materials with saturable nonlinearity." Journal of Applied Physics 133, no. 13 (2023): 133102. http://dx.doi.org/10.1063/5.0139398.

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Femtosecond laser inscriptions in optical media current offer the most reliable optical technology for processing of transparent materials, among which is the laser micromachining technology. In this process, the nonlinearity of the transparent medium can be either intrinsic or induced by multiphoton ionization processes. In this work, a generic model is proposed to describe the dynamics of femtosecond laser inscription in transparent materials characterized by a saturable nonlinearity. The model takes into account multiphoton ionization processes that can induce an electron plasma of inhomoge
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45

Gibson, G. N., R. R. Freeman, T. J. McIlrath, and H. G. Muller. "Excitation and ionization dynamics in short-pulse multiphoton ionization." Physical Review A 49, no. 5 (1994): 3870–74. http://dx.doi.org/10.1103/physreva.49.3870.

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46

Vikas and M. Deb B. "Interaction of atoms with intense laser fields." Journal of Indian Chemical Society Vol. 79, Apr 2002 (2002): 308–19. https://doi.org/10.5281/zenodo.5840884.

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Theoretical Chemistry Group, Department of Chemistry, Panjab University, Chandigarh-160 014, India <em>E-mail</em>: bmdeb@pu.ac.in <em>Fax</em> : 91-0172-545074 In recent years, new, sometimes counterintuitive, phenomena have been discovered in atom-laser interaction, which covers from multiphoton ionization and high harmonic generation in an intense laser field to the suppression of ionization in a superintense field. Traditional perturbative approaches cannot be resorted to for explaining these phenomena. In this article, various non-perturbative approaches developed over the years are discu
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47

Agostini, P., P. Breger, A. L’Huillier, et al. "Giant Stark shifts in multiphoton ionization." Physical Review Letters 63, no. 20 (1989): 2208–11. http://dx.doi.org/10.1103/physrevlett.63.2208.

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48

Agostini, P., P. Breger, A. L'Huillier, et al. "Giant Stark Shifts in Multiphoton Ionization." Physical Review Letters 64, no. 7 (1990): 815. http://dx.doi.org/10.1103/physrevlett.64.815.2.

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49

Faidas, H., and L. G. Christophorou. "Multiphoton ionization of fluoranthene in tetramethylsilane." Journal of Chemical Physics 86, no. 5 (1987): 2505–9. http://dx.doi.org/10.1063/1.452102.

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50

Apicella, B., X. Li, M. Passaro, N. Spinelli, and X. Wang. "Multiphoton ionization of large water clusters." Journal of Chemical Physics 140, no. 20 (2014): 204313. http://dx.doi.org/10.1063/1.4878663.

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