Double ionization of He(1<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">s</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>) and He(1<i>s</i>2<i>s</i><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow /><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mm

Teng, Zhong-jian; Shakeshaft, Robin

doi:10.1103/physreva.49.3597

Cited by 61 publications

(29 citation statements)

References 28 publications

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“…At very high excess energies of eV 450 finally , one electron is found to leave fast, carrying away most of the photon energy and angular momentum. In the angular distributions of the second, slow electron clear traces of the mechanism which led to its ejection can be found (see also Teng and Shakeshaft (1994); Keller (2000)). Electrons emitted via the shake-off mechanism are expected to be isotropic or slightly backward directed with respect to the primary electron, while electrons knocked out in a binary collision (TS1-mechanism) will yield °90 between the two electrons.…”

Section: Double Ionisation Of Atoms: a Brief Summarymentioning

confidence: 97%

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

et al. 2003

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Recoil-ion and electron momentum spectroscopy is a rapidly developing technique that allows one to measure the vector momenta of several ions and electrons resulting from atomic or molecular fragmentation. In a unique combination, large solid angles close to π Microccopes -the "bubble chambers of atomic physics" -mark the decisive step forward to investigate many-particle quantum-dynamics occurring when atomic and molecular systems or even surfaces and solids are exposed to time-dependent external electromagnetic fields.The present review concentrates on just these latest technical developments and on at least four new classes of fragmentation experiments that have emerged within about the last five years. First, multi-dimensional images in momentum space brought unprecedented information on the dynamics of single-photon induced fragmentation of fixed-in-space molecules and on their structure. Second, a break-through in the investigation of highintensity short-pulse laser induced fragmentation of atoms and molecules has been achieved by using Reaction Microccopes. Third, for electron and ion-impact, the investigation of twoelectron reactions has matured to a state such that first fully differential cross sections (FDCS) are reported. Forth, comprehensive sets of FDCS for single ionisation of atoms by ion-impact, the most basic atomic fragmentation reaction, brought new insight, a couple of surprises and unexpected challenges to theory at keV to GeV collision energies. In addition, a brief summary on the kinematics is provided at the beginning. Finally, the rich future potential of the method is shortly envisaged.2

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Section: Double Ionisation Of Atoms: a Brief Summarymentioning

confidence: 97%

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

et al. 2003

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“…The growing number of theoretical calculations has been recently devoted to the double photoeffect on excited metastable 2 1,3 S states of the helium isoelectronic sequence [4,5,6,7,8,9,10,11,12,13]. The problem is also of particular interest, because it is concerned with the study of inter-shell electron correlations.…”

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confidence: 99%

Nonrelativistic double photoeffect on lithium-like ions at high energies

Михайлов

Nefiodov

et al. 2006

Physics Letters A

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The total cross section for double ionization of lithiumlike ions by a high-energy photon is calculated in leading order of the nonrelativistic perturbation theory. The partial contributions due to simultaneous and sequential emissions of two electrons are taken into account. The cross section under consideration is shown to be related to those for double photoeffect on the ground and excited 2 1,3 S states of heliumlike ions. The double-to-single ionization ratio is equal to R = 0.288/Z 2 for lithiumlike ions with moderate nuclear charge numbers Z. However, even for the lightest three-electron targets such as Li and Be + , analytical predictions are found to be in good agreement with the numerical calculations performed within the framework of different rather involved approaches.

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“…For example, DPI was investigated comparing results for the He (1s 2 1 S) ground state to the (1s2s 1;3 S) excited states at high energies [3] as well as close to threshold [4][5][6]. Significant differences in the total cross sections, their excess energy dependence, and their electron angular distributions were predicted.…”

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confidence: 99%

Controlling Two-Electron Threshold Dynamics in Double Photoionization of Lithium by Initial-State Preparation

et al. 2009

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Double photoionization (DPI) and ionization-excitation (IE) of Lið2sÞ and Lið2pÞ, state-prepared and aligned in a magneto-optical trap, were explored in a reaction microscope at the free-electron laser in Hamburg (FLASH). From 6 to 12 eV above threshold (@! ¼ 85, 91 eV), total as well as differential DPI cross sections were observed to critically depend on the initial state and, in particular, on the alignment of the 2p orbital with respect to the VUV-light polarization, whereas no effect is seen for IE. The alignment sensitivity is traced back to dynamical electron correlation at threshold.

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Double ionization of He(1s2) and He(1s2s3

Cited by 61 publications

References 28 publications

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Nonrelativistic double photoeffect on lithium-like ions at high energies

Controlling Two-Electron Threshold Dynamics in Double Photoionization of Lithium by Initial-State Preparation

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