Double Photoionization and Transfer Ionization of He: Shakeoff Theory Revisited

Shi, Ting; Lin, C. D.

doi:10.1103/physrevlett.89.163202

Cited by 37 publications

(35 citation statements)

References 19 publications

(23 reference statements)

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“…For instance, such aspects are electron-electron correlation and entanglement [2][3][4], selection rules [5][6][7], ionization mechanisms [8][9][10], scattering and interference effects, and photon energy and polarization [11]. These characteristics dictate the kinetic energy and the emission pattern of the electrons escaping upon ionization of the target.…”

Section: Introductionmentioning

confidence: 99%

Auger decay and subsequent fragmentation pathways of ethylene followingK-shell ionization

et al. 2015

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The fragmentation pathways and dynamics of ethylene molecules after core ionization are explored using coincident measurements of the Auger electron and fragment ions by employing the cold target recoil-ion momentum spectroscopy method. The influence of several factors on the dynamics and kinematics of the dissociation is studied. These include propensity rules, ionization mechanisms, symmetry of the orbitals from which the Auger electrons originate, multiple scattering, conical intersections, interference, and possible core-hole localization for the double ionization of this polyatomic molecule. Energy correlation maps allow probing the multidimensional potential energy surfaces and, in combination with our multiconfiguration self-consistent field calculations, identifying the populated electronic states of the dissociating dication. The measured angular distributions of the Auger electrons in the molecular frame further support and augment these assignments. The deprotonation and molecular hydrogen ion elimination channels show a nearly isotropic Auger electron angular distribution with a small elongation along the direction perpendicular to the molecular axis. For the symmetric breakup the angular distributions show a clear influence of multiple scattering on the outgoing electrons. The lowest kinetic energy release feature of the symmetric breakup channel displays a fingerprint of entangled Auger and photoelectron motion in the angular emission pattern identifying this transition as an excellent candidate to probe core-hole localization at a conical intersection of a polyatomic molecule.

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Section: Introductionmentioning

confidence: 99%

Auger decay and subsequent fragmentation pathways of ethylene followingK-shell ionization

et al. 2015

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“…Such a process, which becomes possible if the atomic target has at least two electrons, is called transfer ionization. During the last decade transfer ionization in collisions of protons with helium atoms has attracted much attention [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of transfer ionization in fast ion-atom collisions

Voitkiv

2012

Phys. Rev. A

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We consider transfer ionization in collisions of fast (3.6–11 MeV/u) protons, α particles and lithium nuclei with helium atoms. There are just a few basic mechanisms contributing to this process which can be grouped into correlated ones, which crucially depend on the electron-electron interaction, and uncorrelated, which do not need this interaction to proceed. We show that by exploring momentum spectra of the emitted electrons the correlated and uncorrelated mechanisms can be clearly separated from each other. This exploration also enables one to get insight into subtle details of the dynamics of transfer ionization

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“…(Note that the ψ f in equation (7) are eigenfunctions of the full atomic Hamiltonian H at including electron-electron interaction, in contrast to the final states in equation (6).) From equation (4), however, it immediately follows that…”

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confidence: 99%

“…shake-off and knock-out). From [6] it is not entirely clear how much of this "overshooting" has to be attributed to a poor choice of the ground state wavefunction (leading to an asymptotic highenergy limit which is somewhat too large) and how much would still be observed using a more accurate initial state. Assuming that this effect persists it would be obvious that again no physical meaning can be ascribed to this definition of shake-off, since shake-off alone would already be larger than the sum of all mechanisms.…”

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confidence: 99%

On the role of shake-off in single-photon double ionization

Pattard¹,

Schneider²,

Rost³

2003

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

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Abstract. The role of shake-off for double ionization of atoms by a single photon with finite energy has become the subject of debate. In this letter, we attempt to clarify the meaning of shake-off at low photon energies by comparing different formulations appearing in the literature and by suggesting a working definition. Moreover, we elaborate on the foundation and justification of a mixed quantum-classical ansatz for the calculation of single-photon double ionization.

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Double Photoionization and Transfer Ionization of He: Shakeoff Theory Revisited

Cited by 37 publications

References 19 publications

Auger decay and subsequent fragmentation pathways of ethylene followingK-shell ionization

Auger decay and subsequent fragmentation pathways of ethylene followingK-shell ionization

Dynamics of transfer ionization in fast ion-atom collisions

On the role of shake-off in single-photon double ionization

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