Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki

Observation and investigation of the two-electron multiphoton atomic ionization process

I. S. Aleksakhin, Nikolai B. Delone, I.P. Zapesochnyi, В. В. Суран

Published Mar 1, 1979• 0 citations
OpenAlex

Related papers

Observation and study of two-electron multiphoton ionization of atoms

I. S. Aleksakhin, Nikolai B. Delone, I.P. Zapesochnyi +1 more

Journal of Experimental and Theoretical Physics•Mar 1, 1979•3 citations

A mechanism of two-electron multiphoton ionization of atoms

Nikolai B. Delone, B. A. Zon, В. П. Крайнов +1 more

ZhETF Pisma Redaktsiiu•Sep 1, 1979•0 citations

Multiphoton ionization of atoms

Nikolai B. Delone

The most important results of study of multiphoton ionization of atoms are reviewed. Discussions are presented of specific features of the process, theoretical methods of description of ionization of atoms in a strong light field, the basic principles of design of experiments in which intense laser radiation is used, results of investigation of direct and resonance processes of multiphoton ionization, and the mutual relation between multiphoton processes (multiphoton excitation and ionization) and various phenomena leading to perturbation of the spectrum of bound states of an electron in an atom under the influence of a strong light field.

Soviet Physics Uspekhi•Mar 31, 1975•57 citations

The two-electron mechanism of the formation of doubly charged ions by the multiphoton ionization of Ba atoms with two-laser radiation

І. І. Бондар, В. В. Суран

The experimental investigation of the formation of doubly charged ions by the multiphoton ionization of Ba atoms by simultaneous irradiation with the fundamental radiation of a colour centres laser (ω = 8800–8880 cm −1 ) and its second harmonics was carried out. A two-electron mechanism was observed to be responsible for the formation of these ions; they are formed as a result of the excitation and subsequent ionization of strongly perturbed states of neutral Ba atoms.

Journal of Physics B Atomic Molecular and Optical Physics•Aug 7, 2002•12 citations

Multiphoton Ionization of Atoms (REVIEW)

Didier Normand, Jürgen Reif, J. Morellec

•Jan 1, 1984•0 citations

Investigations of resonantly enhanced multiphoton ionizations of atomic mercury and potassium

Kelly Robert Lim Mah

Two investigations are reported on the application of resonantly enhanced multiphoton ionization (RMPI) to gaseous mixtures of an atomic vapor and a few Torr of argon. Photon fluxes large enough to ionize atoms by RMPI were produced by focussing down the light from a tunable pulsed dye laser. The irradiances generated were of the order of 500MWcm⁻². Ionization was detected by a voltage biased wire electrode that simply collected the photoelectrons either directly or after some gas multiplication. One investigation was the measurement of the dependence of RMPI processes in mercury on the polarization of the incident light for comparisons with theoretical calculations. The processes were four-photon resonant absorptions to either a ¹S₀ or ¹’³D₂ level followed by single photon ionization. Complete photoionization of all atoms excited to the resonant levels is established and the measured polarization dependences are found to agree with the calculated polarization dependence for the resonant excitation step of the RMPI process. Unexplained observations of the distortions in the polarization dependence of the ion yield and the absorption linewidth of the 6d ¹D₂ resonance are discussed. The second investigation was a study of the density dependent electric dipole forbidden two-photon resonant transition ²S → ²P in three-photon RMPI spectra of the Rydberg states of potassium. Stark interactions are shown to be unlikely and too weak. From the characteristics of the spectra, the excitation process is identified as a laser-assisted collision interaction.

•Jan 1, 2010•0 citations
The most important results of study of multiphoton ionization of atoms are reviewed. Discussions are presented of specific features of the process, theoretical methods of description of ionization of atoms in a strong light field, the basic principles of design of experiments in which intense laser radiation is used, results of investigation of direct and resonance processes of multiphoton ionization, and the mutual relation between multiphoton processes (multiphoton excitation and ionization) and various phenomena leading to perturbation of the spectrum of bound states of an electron in an atom under the influence of a strong light field.
Two investigations are reported on the application of resonantly enhanced multiphoton ionization (RMPI) to gaseous mixtures of an atomic vapor and a few Torr of argon. Photon fluxes large enough to ionize atoms by RMPI were produced by focussing down the light from a tunable pulsed dye laser. The irradiances generated were of the order of 500MWcm⁻². Ionization was detected by a voltage biased wire electrode that simply collected the photoelectrons either directly or after some gas multiplication. One investigation was the measurement of the dependence of RMPI processes in mercury on the polarization of the incident light for comparisons with theoretical calculations. The processes were four-photon resonant absorptions to either a ¹S₀ or ¹’³D₂ level followed by single photon ionization. Complete photoionization of all atoms excited to the resonant levels is established and the measured polarization dependences are found to agree with the calculated polarization dependence for the resonant excitation step of the RMPI process. Unexplained observations of the distortions in the polarization dependence of the ion yield and the absorption linewidth of the 6d ¹D₂ resonance are discussed. The second investigation was a study of the density dependent electric dipole forbidden two-photon resonant transition ²S → ²P in three-photon RMPI spectra of the Rydberg states of potassium. Stark interactions are shown to be unlikely and too weak. From the characteristics of the spectra, the excitation process is identified as a laser-assisted collision interaction.