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Zouros, T. J. M.; Lee, D.H.; Richard, Patrick

doi:10.1103/physrevlett.62.2261

Cited by 84 publications

(40 citation statements)

References 19 publications

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“…In 1989, Zouros et al [1] showed that the 1s → 2p projectile excitation cross section for Li-like F 6+ and O 5+ ions in collisions with H 2 and He (see Figs. 1-2) was found to increase when the projectile velocity V p was such that 1 2 mV 2 p ∆E, where ∆E is the projectile 1s → 2p excitation energy and m the mass of the electron.…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

“…1-2) was found to increase when the projectile velocity V p was such that 1 2 mV 2 p ∆E, where ∆E is the projectile 1s → 2p excitation energy and m the mass of the electron. This enhancement of the projectile excitation cross section on passing the electron impact excitation threshold ∆E was interpreted as being due to the onset of direct projectile-electron-target-electron interactions in a process named electron-electron excitation (eeE) [1]. In reverse kinematics, the quasi-free target electrons as seen by the ion from the projectile frame, forms an "electron beam" that can excite the projectile electrons once its impact kinetic energy is larger than ∆E.…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

“…This threshold, however, is partially diffused by the rather broad electron momentum distribution due to its orbital motion around the target. Today, this process is well understood within the electron scattering model [2][3][4][5] and the Born approximation [6,7] and is found to be important in excitation [1,[7][8][9] and ionization [10][11][12][13] processes in ion-atom collisions [14][15][16]. It is particularly prevalent in ion collisions with low-Z targets, where competition from excitation due to the target-nucleus charge is relatively smaller [16].…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

“…[1] referred to the production of a particular state, the 1s2s2p 4 P, for which other competing target-nucleus excitation processes are forbidden due to spin selection rules, thus making this state uniquely accessible by the eeE process:…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

“…The energy dependence of 1s2s2p 4 P is shown in Figs. 1 [1,9,18]. The arrow marks the threshold for electron impact excitation.…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

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Production of 1s2s2p4P states by transfer-loss cascades in O5+ collisions with he and H2 targets

Zouros¹,

Sulik²,

Gulyás³

et al. 2006

Braz. J. Phys.

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Single differential cross-sections for transfer-loss (TL) leading to the production of O 5+ (1s2s 3 S)nl 4 L states were computed for 0.2-1.2 MeV/u collisions of O 5+ (1s 2 2s) ions with He and H 2 targets. At these collision energies, 1s loss is significant and electron transfer to n = 3 − 4 levels is dominant. Furthermore, due to spin conservation, quartet states can only be populated by TL. Within the independent particle model (IPM), the probability of 1s electron loss from O 5+ (1s 2 2s) projectiles was calculated using the semi-classical approach, while the probability for electron transfer to the O 5+ (1s2s 3 S)nl 4 L states (n ≥ 2) was computed using the continuum distorted wave (CDW) approximation. The majority of states with n > 2 can be assumed to have sufficient time to eventually decay with an almost 100% probability to the long-living metastable 1s2s2p 4 P level via a much faster sequence of electric dipole transitions, thus establishing an upper limit to such cascade contributions. The inclusion of this cascade feeding is found to lead to a strong enhancement in the production of the 1s2s2p 4 P states, particularly for collisions with the H 2 target, thus reducing dramatically the existing two-order of magnitude discrepancy between older TL calculations (for n = 2 only) and existing zero-degree Auger projectile electron spectroscopy measurements.

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Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

“…The energy dependence of 1s2s2p 4 P is shown in Figs. 1 [1,9,18]. The arrow marks the threshold for electron impact excitation.…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

See 3 more Smart Citations

Production of 1s2s2p4P states by transfer-loss cascades in O5+ collisions with he and H2 targets

Zouros¹,

Sulik²,

Gulyás³

et al. 2006

Braz. J. Phys.

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Newly appreciated roles for electrons in ion-atom collisions

Sellin

Lecture Notes in Physics

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Since the previous Debrecen workshop on High-Energy Ion-Atom Collisions there have been numerous experiments and substantial theoretical developments in the fields of fast ion-atom and ion-solid collisions concerned with explicating the previously largely underappreciated role of electrons as ionizing and exciting agents in such collisions. Examples to be discussed include the double electron ionization problem in He; transfer ionization by protons in He; double excitation in He; backward scattering of electrons in He; the role of electron-electron interaction in determining beta parameters for ELC; projectile K ionization by target electrons; electron spin exchange in transfer excitation; electron impact ionization in crystal channels; resonant coherent excitation in crystal channels; excitation and dielectronic recombination in crystal channels; resonant transfer and excitation; the similmfity of recoil ion spectra observed in coincidence with electron capture vs. electron loss; and new research on ion-atom collisions at relativistic energies.

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Resonant Transfer and Excitation Associated with Auger Electron Emission

Zouros

1992

Recombination of Atomic Ions

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Projectile1s→2pexcitation due to electron-electron interaction in collisions ofO5+andF6

Cited by 84 publications

References 19 publications

Production of 1s2s2p4P states by transfer-loss cascades in O5+ collisions with he and H2 targets

Production of 1s2s2p4P states by transfer-loss cascades in O5+ collisions with he and H2 targets

Newly appreciated roles for electrons in ion-atom collisions

Resonant Transfer and Excitation Associated with Auger Electron Emission

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