<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ne</mml:mi></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ne</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>ion formation in circularly polarized laser fields: Compa

Kornev, A. S.; Tulenko, Elena B.; Zon, B. A.

doi:10.1103/physreva.69.065401

Cited by 21 publications

(15 citation statements)

References 9 publications

(18 reference statements)

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“…[23][24][25][26], the formation of multiply charged ions due to the tunnel effect is a multichannel cascading process. In conditions of the experiments from Refs.…”

Section: Kinetic Equationsmentioning

confidence: 99%

“…The total ionization of the outer shells of the neutral atoms occurs in the range 10 14 -10 16 W/cm 2 [23,24]. Therefore all atoms in the pulse front can be regarded to be ionized up to the term l 4l+2 ( 1 S 0 ).…”

Section: Kinetic Equationsmentioning

confidence: 99%

“…We have developed the many-body theory of tunnel ionization earlier in Refs. [21][22][23][24][25][26]. Within the framework of this theory, it has been shown that for the ions of multiplicity 2 and higher the inelastic tunnel effect (ITE) appears to be quite essential, allowing to take into account the filling of the ion excited states within the intermediate stages of the process [23,24].…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23][24][25][26]. Within the framework of this theory, it has been shown that for the ions of multiplicity 2 and higher the inelastic tunnel effect (ITE) appears to be quite essential, allowing to take into account the filling of the ion excited states within the intermediate stages of the process [23,24]. In the fields with FWHM less than 5 fs, the collective tunnel effect can become dominant * a-kornev@yandex.ru when some electrons are removed from an atom or an ion simultaneously [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Multiple ionization of Ar, Kr, and Xe in a superstrong laser field

2011

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We report the numerical calculation of Ar 9+ · · · Ar 13+ , Kr 13+ · · · Kr 17+ , and Xe 19+ · · · Xe 23+ ion yield in the laser field with intensity exceeding 10 19 W/cm 2 . The results of the calculations agree with the experimental data [K. Yamakawa et al., Phys. Rev. A 68, 065403 (2003)] (for the Ar ions) or qualitatively (for the Kr ions). The theoretical results disagree with the experimental data for the Xe ions. We discuss the possible influence of the relativistic effects on this disagreement between theory and experiment. We obtained the approximation formula for the position of the maximum ionic population with the given ionization multiplicity Z depending on the radiation intensity. This position is described by the power function of Z; the exponent is determined by the dependence of sequential ionization potentials on Z value. We discuss the dependence of the approximation formula parameters on the value of the FWHM of the laser pulse.

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“…[23][24][25][26], the formation of multiply charged ions due to the tunnel effect is a multichannel cascading process. In conditions of the experiments from Refs.…”

Section: Kinetic Equationsmentioning

confidence: 99%

Section: Kinetic Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiple ionization of Ar, Kr, and Xe in a superstrong laser field

2011

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“…Two main mechanisms are responsible for creating an ion in an excited electronic state after optical tunnelling. First, the laser pulse may remove electron from a low-lying orbital, leaving the ionic core excited [11,[13][14][15][16][17][22][23][24][25][26][27] (shown schematically in Fig. 1(a)).…”

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confidence: 99%

Momentum transfers in correlation-assisted tunneling

Pisanty

Ivanov

2014

Phys. Rev. A

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We consider correlation-assisted tunnel ionization of a small molecule by an intense low-frequency laser pulse. In this mechanism, the departing electron excites the state of the ion via a Coulomb interaction. We show that the wavepackets emerging from this process can have nontrivial spatial structure and give a measurable indicator of correlated multielectron dynamics during the tunnelling step. We also show that the saddle-point approximation requires special attention in this geometric analysis.The strong correlations and interactions of electrons in close proximity are core concepts in atomic, molecular and solid-state physics. For example, in photoionization they feature in mechanisms like auto-ionization [7,8], and many others. These correlationdriven mechanisms can leave clear traces that identify them, such as the Fano line-shapes in autoionization, but the distinction between different mechanisms can also be blurry, as in the case of separating contributions of shakeup and post-ionization interaction (see e.g. Ref. 9).In contrast to one-photon ionization, analyses of strongfield ionization, often viewed as optical tunnelling, have been dominated by the single active electron approximation. The inclusion of multi-electron effects beyond selfconsistent field corrections [10] was triggered by the realization that molecular ions produced in strong laser fields are often electronically excited [11,12], and that these excitations affect all subsequent processes [13][14][15][16][17]. Recent ab initio simulations [18,19] and experiments [20,21] confirm that in molecules electronic excitations during the ionization process are a rule rather than an exception.Two main mechanisms are responsible for creating an ion in an excited electronic state after optical tunnelling. First, the laser pulse may remove electron from a low-lying orbital, leaving the ionic core excited [11,[13][14][15][16][17][22][23][24][25][26][27] (shown schematically in Fig. 1(a)). Alternatively, the electron may depart from the highest occupied molecular orbital (HOMO) and subsequently excite the core through a Coulomb interaction (shown in Figs. 1(b,c)). This can happen either inside the tunnelling barrier [28], shown in (b), or after the tunnelling step [11,12], shown in (c). We refer to both (b) and (c) as correlation-assisted tunnelling. A more formal description of these processes has recently been developed [29,30], which applies an analytical version of the R-matrix approach [31] to strong field ionization. It appears that correlation-inducing interactions (as opposed to mean-field interactions such as those studied in Ref. 10) are strong enough to influence and even dominate the ionization process. However, the calculations in Refs. [29,30] only present total ionization rates, and these do not readily yield direct, qualitative traces of the interactions that shape the tunnelling process.This work looks for such traces in the angular distribution of the photoelectron. We show that correlation-assisted tunnelling, as shown in Figs. 1(...

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Multiple ionization of Kr in an intense circularly polarized laser field

Gubbini

Eichmann

Kalashnikov

et al. 2006

J. Phys. B: At. Mol. Opt. Phys.

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We have investigated atomic ionization dynamics in krypton with circularly polarized light from a Ti-Sapphire laser in the intensity regime between 1016 W cm−2 and 1018 W cm−2. We have measured the yields of highly charged ions stemming from the 4s and 3d shells. The objective of the present work is to investigate the applicability of the single-active-electron description for the ionization rates. We found that for intense laser pulses with 40 fs pulse width the dominant process in multiple ionization is pure sequential ionization. The different LS-terms of the ground state configurations of the intermediate ionic charge states do not have a measurable influence on the ionization. Under the assumption that the magnetic m-quantum numbers rearrange sufficiently fast between each ionization step we can apply a single-active-electron description based on the ionization rates from the Ammosov–Delone–Krainov (ADK) theory.

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Ne+andNe2+ion formation in circularly polarized laser fields: Compa

Abstract: The theory of Ne + and Ne 2+ ion formation with due account of sequential, nonsequential and inelastic tunneling is compared with the experimental data [D. N. Fittinghoff et al., Phys. Rev. A 49, 2174(1994].

Cited by 21 publications

References 9 publications

Multiple ionization of Ar, Kr, and Xe in a superstrong laser field

Multiple ionization of Ar, Kr, and Xe in a superstrong laser field

Momentum transfers in correlation-assisted tunneling

Multiple ionization of Kr in an intense circularly polarized laser field

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