Differential cross sections for radiation assisted collisions between atoms

Großer, J.; Hohmeier, D; Klose, S.

doi:10.1088/0953-4075/29/2/017

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…Grosser et al [8] used a continuous beam of Na atoms, a pulsed beam of Kr atoms, two pulsed (pump and probe) laser beams, and crossed all beams in a small interaction volume. They explained an oscillatory structure in the angular distribution of excited Na projectiles after laser-assisted collisions with Kr atoms in terms of optical molecular transitions in the transient NaKr complex.…”

Section: · 10mentioning

confidence: 99%

Circular dichroism in laser-assisted proton-hydrogen collisions

2004

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We investigate the effects of a strong laser field on the dynamics of electron capture and emission in ion-atom collisions within a reduced dimensionality model of the scattering system in which the motion of the active electron and the laser electric field vector are confined to the scattering plane. We examine the probabilities for electron capture and ionization as a function of the laser intensity, the projectile impact parameter b, and the laser phase φ that determines the orientation of the laser electric field with respect to the internuclear axis at the time of closest approach between target and projectile. Our results for the b-dependent ionization and capture probabilities show a strong dependence on both φ and the helicity of the circularly polarized laser light. For intensities above 2 · 10 12 W/cm 2 our model predicts a noticeable circular dichroism in the capture probability for slow proton-hydrogen collisions, that persists after averaging over φ. Capture and electron emission probabilities defer significantly from results for laser-unassisted collisions. Furthermore, we find evidence for a charge resonance enhanced ionization mechanism that may enable the measurement of the absolute laser phase φ.

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Section: · 10mentioning

confidence: 99%

Circular dichroism in laser-assisted proton-hydrogen collisions

2004

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“…The experiment has been described previously. , We therefore summarize here only the most important aspects. Figure shows the experimental setup.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…We have demonstrated − that crossed beam experiments on laser assisted (“optical”) atom−atom collisions, where the photon energy h ν is detuned with respect to the atomic A−A* transition energy, offer unprecedented possibilities for observing collision processes and for investigating the underlying molecular interactions. Especially, polarization experiments have been shown to give direct access to the geometric properties of the collision complex AM.…”

Section: Introductionmentioning

confidence: 99%

Direct Observation of the Geometry of Atom−Atom and Atom−Molecule Collisions

et al. 1997

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We report crossed beam experiments on the laser assisted collisions Na(3s) + M + hν f Na(3p) + M with M ) Kr, N 2 , and CO 2 . By varying the photon polarization, we gain direct insight into the geometric properties of the collision complex. For the Na + Kr system, we are able to deduce from the experimental data the two possible directions (Condon vectors) of the internuclear axis at the moment of the optical transition.

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“…2͒ we use two atomic beams and two laser beams intersecting each other in the scattering volume. 4,5 During the optical collision process two atoms and one photon of the excitation laser interact to produce an excited Na atom at the end of the collision. The second laser transfers the excited atom to a long-lived Rydberg state, Na͑3 p ͒ 2 P 1/2,3/2 ϩhЈ˜Na͑nd͒, nϭ20, .…”

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Direct observation of nonadiabatic transitions in Na+rare-gas differential optical collisions

Großer

Hoffmann

Wischeler

et al. 1999

The Journal of Chemical Physics

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Differential cross sections for radiation assisted collisions between atoms

Cited by 8 publications

References 13 publications

Circular dichroism in laser-assisted proton-hydrogen collisions

Circular dichroism in laser-assisted proton-hydrogen collisions

Direct Observation of the Geometry of Atom−Atom and Atom−Molecule Collisions

Direct observation of nonadiabatic transitions in Na+rare-gas differential optical collisions

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