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Int. J. Mol. Sci., Volume 3, Issue 3 (March 2002), Pages 114-233

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Editorial

Jump to: Research, Other

Open AccessEditorial Charge Transfer in Ionic and Molecular Systems
Int. J. Mol. Sci. 2002, 3(3), 114; doi:10.3390/i3030114
Received: 5 February 2002 / Published: 28 March 2002
Cited by 1 | PDF Full-text (11 KB) | HTML Full-text | XML Full-text
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

Research

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Open AccessArticle Electron Capture in Collisions of Slow Highly Charged Ions with an Atom and a Molecule: Processes and Fragmentation Dynamics
Int. J. Mol. Sci. 2002, 3(3), 115-131; doi:10.3390/i3030115
Received: 9 October 2001 / Accepted: 22 November 2001 / Published: 28 March 2002
Cited by 5 | PDF Full-text (209 KB) | HTML Full-text | XML Full-text
Abstract
Processes involved in slow collisions between highly charged ions (HCI) and neutral targets are presented. First, the mechanisms responsible for double electron capture are discussed. We show that, while the electron-nucleus interaction is expected to be dominant at projectile velocities of about 0.5
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Processes involved in slow collisions between highly charged ions (HCI) and neutral targets are presented. First, the mechanisms responsible for double electron capture are discussed. We show that, while the electron-nucleus interaction is expected to be dominant at projectile velocities of about 0.5 a.u., the electron-electron interaction plays a decisive role during the collision and gains importance when the projectile velocity decreases. This interaction has also to be invoked in the capture of core electrons by HCI. Finally, the molecular fragmentation of H2 following the impact of HCI is studied. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Alignment-Dependent Atomic Model for Electron Transfer in Ion-Molecule Collisions
Int. J. Mol. Sci. 2002, 3(3), 132-141; doi:10.3390/i3030132
Received: 23 October 2001 / Accepted: 19 November 2001 / Published: 28 March 2002
Cited by 1 | PDF Full-text (199 KB) | HTML Full-text | XML Full-text
Abstract
The alignment-dependent atomic model for treating electron transfer processes in ion-molecule collisions [Shingal and Lin, Phys. Rev. 1989, A40, 1302] is reviewed. This model has been applied to collisions between H+ and He2+ with H2, and recently also to
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The alignment-dependent atomic model for treating electron transfer processes in ion-molecule collisions [Shingal and Lin, Phys. Rev. 1989, A40, 1302] is reviewed. This model has been applied to collisions between H+ and He2+ with H2, and recently also to collisions between He2+ and Ar2+ ions with H2+, where alignment effect is being explored experimentally. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Charge Exchange in Low-Energy H, D + C4+ Collisions with Full Account of Electron Translation
Int. J. Mol. Sci. 2002, 3(3), 142-161; doi:10.3390/i3030142
Received: 1 January 2001 / Accepted: 2 January 2002 / Published: 28 March 2002
Cited by 9 | PDF Full-text (263 KB) | HTML Full-text | XML Full-text
Abstract
The effect of the anisotropy of the interaction potential on ion-diatom non-adiabatic collisions is analized by considering the influence of the anisotropy on orientation averaged total cross sections for charge transfer in H++H2(X1Σ+g ) collisions.
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The effect of the anisotropy of the interaction potential on ion-diatom non-adiabatic collisions is analized by considering the influence of the anisotropy on orientation averaged total cross sections for charge transfer in H++H2(X1Σ+g ) collisions. We discuss the possibility of employing simpli ed methods such as an isotropic approximation, where only the electronic energies and interactions of a single orientation are necessary. The use of several isotropic calculations to evaluate the orientation averaged cross section is analized. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Studies of Electron Capture by Multiply Charged Ions from Molecules using Translational Energy Spectroscopy
Int. J. Mol. Sci. 2002, 3(3), 162-175; doi:10.3390/i3030162
Received: 14 December 2001 / Accepted: 30 January 2002 / Published: 28 March 2002
Cited by 4 | PDF Full-text (299 KB) | HTML Full-text | XML Full-text
Abstract
The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N2+, O2+, Si3+ and Si4+
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The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N2+, O2+, Si3+ and Si4+ on a He target, in order to examine the present status of the agreement between theory and experiment. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Rate Coefficient Determination in Charge Transfer Reactions
Int. J. Mol. Sci. 2002, 3(3), 176-189; doi:10.3390/i3030176
Received: 18 December 2001 / Accepted: 17 January 2002 / Published: 28 March 2002
Cited by 1 | PDF Full-text (208 KB) | HTML Full-text | XML Full-text
Abstract
The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N2+, O2+, Si3+ and Si4+
[...] Read more.
The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N2+, O2+, Si3+ and Si4+ on a He target, in order to examine the present status of the agreement between theory and experiment. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Charge Exchange in Low-Energy H, D + C4+ Collisions with Full Account of Electron Translation
Int. J. Mol. Sci. 2002, 3(3), 190-208; doi:10.3390/i3030190
Received: 10 January 2002 / Accepted: 17 January 2002 / Published: 30 March 2002
Cited by 3 | PDF Full-text (251 KB)
Abstract
We report the application of the quantum approach, which takes full account of electron translation at low collisional energies, to the charge exchange process H, D + C4+ → H+, D+ + C3+(3s; 3p;
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We report the application of the quantum approach, which takes full account of electron translation at low collisional energies, to the charge exchange process H, D + C4+ → H+, D+ + C3+(3s; 3p; 3d). The partial and the total integral cross sections of the process are calculated in the energy range from 1 till 60 eV/amu. It is shown that the present results are independent from the upper integration limit for numerical solution of the coupled channel equations although nonadiabatic couplings remain nonzero up to infinity. The calculated partial and total cross sections are in agreement with the previous low-energy calculations and the available experimental data. It is shown that for low collisional energies the isotopic effect takes place. The observed effect is explained in terms of the nonadiabatic dynamics. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Single Electron Capture in Slow Collisions of Doubly Charged Ions with Dinuclear Molecules
Int. J. Mol. Sci. 2002, 3(3), 209-219; doi:10.3390/i3030209
Received: 11 January 2002 / Accepted: 30 January 2002 / Published: 28 March 2002
PDF Full-text (209 KB) | HTML Full-text | XML Full-text
Abstract
We have performed translational-spectroscopical measurements on single electron capture (SEC) by impact of slow (impact energy ≤ 1 keV) doubly charged ions on dinuclear molecules. For impact of C2+ and N2+ ions the influence of their metastable fractions on the SEC
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We have performed translational-spectroscopical measurements on single electron capture (SEC) by impact of slow (impact energy ≤ 1 keV) doubly charged ions on dinuclear molecules. For impact of C2+ and N2+ ions the influence of their metastable fractions on the SEC probability has been studied. For impact of 4He2+ on O2 and CO direct and dissociative SEC have been investigated. For all collision systems studied the principal SEC channels can be explained by the "reaction window" which results from multichannel-Landau-Zener treatments for the collisional quasimolecules. Full article
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessArticle Low-Energy Charge Transfer in Multiply-Charged Ion-Atom Collisions Studied with the Combined SCVB-MOCC Approach
Int. J. Mol. Sci. 2002, 3(3), 220-229; doi:10.3390/i3030220
Received: 15 December 2001 / Accepted: 16 January 2002 / Published: 28 March 2002
Cited by 3 | PDF Full-text (101 KB) | HTML Full-text | XML Full-text
Abstract
A survey of theoretical studies of charge transfer involving collisions of multiply-charged ions with atomic neutrals (H and He) is presented. The calculations utilized the quantum-mechanical molecular-orbital close-coupling (MOCC) approach where the requisite potential curves and coupling matrix elements have been obtained with
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A survey of theoretical studies of charge transfer involving collisions of multiply-charged ions with atomic neutrals (H and He) is presented. The calculations utilized the quantum-mechanical molecular-orbital close-coupling (MOCC) approach where the requisite potential curves and coupling matrix elements have been obtained with the spin-coupled valence bond (SCVB) method. Comparison is made among various collision partners, for equicharged systems, where it is illustrated that even for total charge transfer cross sections, scaling-laws do not exist for low-energy collisions (i.e. < 1 keV/amu). While various empirical scaling-laws are well known in the intermediateand high-energy regimes, the multi-electron configurations of the projectile ions results in a rich and varied low-energy dependence, requiring an explicit calculation for each collision-partner pair. Future charge transfer problems to be addressed with the combined SCVB-MOCC approach are briefly discussed. Full article

Other

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Open AccessNew Book Received Highlights in Solute-Solvent Interactions
Int. J. Mol. Sci. 2002, 3(3), 230-231; doi:10.3390/i3030230
Received: 26 March 2002 / Published: 28 March 2002
PDF Full-text (12 KB) | HTML Full-text | XML Full-text
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)
Open AccessNew Book Received The Law of Mass Action
Int. J. Mol. Sci. 2002, 3(3), 232-233; doi:10.3390/i3030232
Received: 25 March 2002 / Published: 27 March 2002
PDF Full-text (12 KB) | HTML Full-text | XML Full-text
(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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