Alignment of H(2p) in H-He, Ne, Ar collisions

Madeheim, H.; Hippler, R.; Lutz, H. O.

doi:10.1007/bf01437176

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…A detailed description of the experimental set-up, except for the arrangement of the electric field, has been given elsewhere [23][24][25]. Very briefly, the apparatus consists of a duoplasmatron ion source, a scattering chamber containing the electric field plates, and a polarizationsensitive detector for Lyman-c~ radiation.…”

Section: Hi Experimental Set-upmentioning

confidence: 99%

“…The present results display a pronounced minimum around 15 keV; previous results by Krotkov and Stone [18] show a similar energy-dependence but differ from our results by a factor of g2. To extract the values of ~l(a~p) from the measured asymmetries, Krotkov and Stone found it "necessary to adopt values for the partial cross sections ao and ~r 1 "; these were calculated from the available polarization data of Dose et al [41], which nowadays are believed to be incorrect [25].…”

Section: B H-hementioning

confidence: 99%

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Coherent excitation of H(n=2) in H+, H - He collisions

Hippler

Plotzke

Harbich

et al. 1991

Z Phys D - Atoms, Molecules and Clusters

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Abstract. The coherent excitation of H (n = 2) in H +, H -He collisions was investigated at incident energies of 5-25 keV. From a polarization analysis of the emitted Lyman-c~ radiation as a function of an external electric field, the partial cross sections for excitation to the H(2s) and the H(2p,~) magnetic substates and the real part of the s -p0-coherence were extracted. For H + -He collisions, the measured partial cross sections are in fair agreement with previous two-electron calculations by Kimura and Lin; the agreement with one-electron calculations of Jain et al. is, particularly at the lower incident energies, less satisfactory. For both collision systems, an energy-dependent forward-backward asymmetry corresponding to a shift of the center-of-charge relative to the center-of-mass (dipole moment) was observed. In H+-He collisions, the measured dipole moment was positive; it thus corresponds to an electron trailing behind the proton. The same analysis applied to the H-He system showed the electron riding in front of the proton.

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Section: Hi Experimental Set-upmentioning

confidence: 99%

Section: B H-hementioning

confidence: 99%

Coherent excitation of H(n=2) in H+, H - He collisions

Hippler

Plotzke

Harbich

et al. 1991

Z Phys D - Atoms, Molecules and Clusters

Self Cite

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Fast Beams, Production and Detection

Pauly¹

2000

Atom, Molecule, and Cluster Beams II

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Coherent excitation in few-electron atomic collisions systems

Hippler

1993

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

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The authors review recent advances in the coherent excitation during atomic collisions. Special attention is paid to alignment and orientation of the excited charge cloud and to the collision-induced dipole moment. The authors focus their discussion on one- and two-electron collision complexes like H+-H and (H-He)+ which provide the benchmark systems for such studies. The theoretical concepts to describe the excitation process utilize the quasi-molecular picture at small velocities and use coupled-channel techniques at medium velocities; they are supplemented by intuitive models to interpret the investigated coherence parameters.

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Alignment of H(2p) in H-He, Ne, Ar collisions

Cited by 5 publications

References 24 publications

Coherent excitation of H(n=2) in H+, H - He collisions

Coherent excitation of H(n=2) in H+, H - He collisions

Fast Beams, Production and Detection

Coherent excitation in few-electron atomic collisions systems

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