Orbital alignment dependence of electron transfer cross sections. IV: 1-15 keV Ne+, Ar+-Na(3p) collisions

J. W. Thomsen; N. Andersen; D. Dowek; J. C. Houver; J. H.V. Lauritsen; U. Müller; J. O.P. Pedersen; J. Salgado; A. Svensson

doi:10.1007/s004600050019

Orbital alignment dependence of electron transfer cross sections. IV: 1-15 keV Ne⁺, Ar⁺-Na(3p) collisions

J. W. Thomsen^*, N. Andersen, D. Dowek, J. C. Houver, J. H.V. Lauritsen, U. Müller, J. O.P. Pedersen, J. Salgado, A. Svensson

^*Corresponding author for this work

11 Citations (Scopus)

Abstract

This paper reports experimental results for the influence of target excitation and orbital alignment on the charge exchange process for the systems Ne⁺, Ar⁺-Na(3s, 3p) for impact energies in the 1-15 keV range. The cross section parameters are found to depend sensitively on collision velocity and choice of projectile. Using earlier results by Aumayr et al (Z. Phys. D 6 (1987) 145-153) for the Na(3s) target, the relative cross sections are put on an absolute scale. A strong dependence of the total electron transfer cross section on the target state is observed, most dramatically for low energy Ar⁺ impact for which the cross section for a Na(3p) target is more than 200 times larger than for Na(3s). Time-of-flight spectra show that electron transfer channels with energy defects near zero are strongly preferred. Cross section estimates based on the Demkov-Olson model account well for the major trends observed, but not for the detailed behavior.

Original language	English
Journal	Zeitschrift fur Physik D-Atoms Molecules and Clusters
Volume	37
Issue number	2
Pages (from-to)	133-139
Number of pages	7
ISSN	0178-7683
DOIs	https://doi.org/10.1007/s004600050019
Publication status	Published - May 1996

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title = "Orbital alignment dependence of electron transfer cross sections. IV: 1-15 keV Ne+, Ar+-Na(3p) collisions",

abstract = "This paper reports experimental results for the influence of target excitation and orbital alignment on the charge exchange process for the systems Ne+, Ar+-Na(3s, 3p) for impact energies in the 1-15 keV range. The cross section parameters are found to depend sensitively on collision velocity and choice of projectile. Using earlier results by Aumayr et al (Z. Phys. D 6 (1987) 145-153) for the Na(3s) target, the relative cross sections are put on an absolute scale. A strong dependence of the total electron transfer cross section on the target state is observed, most dramatically for low energy Ar+ impact for which the cross section for a Na(3p) target is more than 200 times larger than for Na(3s). Time-of-flight spectra show that electron transfer channels with energy defects near zero are strongly preferred. Cross section estimates based on the Demkov-Olson model account well for the major trends observed, but not for the detailed behavior.",

author = "Thomsen, {J. W.} and N. Andersen and D. Dowek and Houver, {J. C.} and Lauritsen, {J. H.V.} and U. M{\"u}ller and Pedersen, {J. O.P.} and J. Salgado and A. Svensson",

year = "1996",

month = may,

doi = "10.1007/s004600050019",

language = "English",

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pages = "133--139",

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T1 - Orbital alignment dependence of electron transfer cross sections. IV

T2 - 1-15 keV Ne+, Ar+-Na(3p) collisions

AU - Thomsen, J. W.

AU - Andersen, N.

AU - Dowek, D.

AU - Houver, J. C.

AU - Lauritsen, J. H.V.

AU - Müller, U.

AU - Pedersen, J. O.P.

AU - Salgado, J.

AU - Svensson, A.

PY - 1996/5

Y1 - 1996/5

N2 - This paper reports experimental results for the influence of target excitation and orbital alignment on the charge exchange process for the systems Ne+, Ar+-Na(3s, 3p) for impact energies in the 1-15 keV range. The cross section parameters are found to depend sensitively on collision velocity and choice of projectile. Using earlier results by Aumayr et al (Z. Phys. D 6 (1987) 145-153) for the Na(3s) target, the relative cross sections are put on an absolute scale. A strong dependence of the total electron transfer cross section on the target state is observed, most dramatically for low energy Ar+ impact for which the cross section for a Na(3p) target is more than 200 times larger than for Na(3s). Time-of-flight spectra show that electron transfer channels with energy defects near zero are strongly preferred. Cross section estimates based on the Demkov-Olson model account well for the major trends observed, but not for the detailed behavior.

AB - This paper reports experimental results for the influence of target excitation and orbital alignment on the charge exchange process for the systems Ne+, Ar+-Na(3s, 3p) for impact energies in the 1-15 keV range. The cross section parameters are found to depend sensitively on collision velocity and choice of projectile. Using earlier results by Aumayr et al (Z. Phys. D 6 (1987) 145-153) for the Na(3s) target, the relative cross sections are put on an absolute scale. A strong dependence of the total electron transfer cross section on the target state is observed, most dramatically for low energy Ar+ impact for which the cross section for a Na(3p) target is more than 200 times larger than for Na(3s). Time-of-flight spectra show that electron transfer channels with energy defects near zero are strongly preferred. Cross section estimates based on the Demkov-Olson model account well for the major trends observed, but not for the detailed behavior.

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JO - Zeitschrift für Physik D-Atoms Molecules and Clusters

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IS - 2

ER -

Orbital alignment dependence of electron transfer cross sections. IV: 1-15 keV Ne⁺, Ar⁺-Na(3p) collisions

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