Multiply charged molecules

Mathur, D.

doi:10.1016/0370-1573(93)90006-y

Cited by 211 publications

(111 citation statements)

References 199 publications

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“…Examination of the correlations between these vectors shows that one pathway to the products involves the dissociation of a transitory collision complex (N 2 The interactions of doubly charged atoms and molecules ͑dications͒ with neutral molecules at low collision energies exhibit many properties of fundamental interest. [1][2][3] At collision energies below 10 eV the significant interaction time between the reactants allows processes which form chemical bonds to occur. 1,4 -7 Further, the presence of two charges in the collision system means that electron transfer, and many bond-forming reactions, result in the formation of a pair of singly charged products which possess considerable translational energy.…”

Section: Communicationsmentioning

confidence: 99%

“…2,3 However, significantly less attention has been paid to the dissociative electron transfer reactions of atomic dications with neutral molecules especially at collision energies below 10 eV. 1 This lack of attention arises as the dissociation of the monocation derived from the neutral molecule significantly complicates the interpretation of translational energy spectra when only the fast monocation derived from the incident dication is detected.…”

Section: Communicationsmentioning

confidence: 99%

“…For each of these events, via conservation of momentum in the COM frame, we can calculate the nascent COM velocity vector w 3 (i) of the accompanying N atom. 5 To understand the dynamics of the reaction we must then examine the relationships between w 1 , w 2 , and w 3 . Figure 1 shows the scattering diagram for the events we detect forming Ne ϩ and N ϩ .…”

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confidence: 99%

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Collision complexes in dissociative single electron transfer between Ne2+ and N2

Harper

Price

2004

The Journal of Chemical Physics

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Experiments involving the coincident detection of the two monocationic products (Ne+ and N+) from the dissociative electron transfer reaction between Ne2+ and N2 at 7.8 eV collision energy allow the nascent velocity vectors of the ionic and neutral (N) products to be determined. Examination of the correlations between these vectors shows that one pathway to the products involves the dissociation of a transitory collision complex (N2Ne2+).

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Section: Communicationsmentioning

confidence: 99%

Section: Communicationsmentioning

confidence: 99%

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Collision complexes in dissociative single electron transfer between Ne2+ and N2

Harper

Price

2004

The Journal of Chemical Physics

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“…It is, therefore, seen that the electron density is enhanced in (Ar-H 2 O) n as compared to pure Ar n . To eject the second electron from a water molecule would require another 16 eV [18,19,20]; this ionization step would occur at time (t-114) fs. By the time the laser intensity reaches ∼2.6×10…”

Section: Introductionmentioning

confidence: 99%

Characterization of doping levels in heteronuclear, gas-phase, van der Waals clusters and their energy absorption from an intense optical field

Jha¹,

Sharma²,

Nataraju³

et al. 2006

Chemical Physics Letters

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A simple mass spectrometric method has been developed to quantify dopant levels in heteronuclear clusters in the gas phase. The method is demonstrated with reference to quantification of the water content in supersonic beams of water-doped argon clusters. Such doped clusters have assumed much importance in the context of recently-reported doping-induced enhancement in the emission of energetic charged particles and photons upon their interaction with intense laser pulses. We have also measured the energy that a doped cluster absorbs from the optical field; we find that energy absorption increases with increasing level of doping. The oft-used linear model of energy absorption is found to be quantitatively inadequate.

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“…Also of great interest are the potential functions for long-lived metastable doubly-or multiplycharged ions [9] that are relevant to high-density energy storage materials and to characterization and analytical methods for biosystems.…”

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Simple Three-Parameter Model Potential for Diatomic Systems: From Weakly and Strongly Bound Molecules to Metastable Molecular Ions

Xie

Gong

2005

Phys. Rev. Lett.

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Based on a simplest molecular orbital theory of H + 2 , a three-parameter model potential function is proposed to describe ground-state diatomic systems with closed-shell and/or S-type valence-shell constituents over a significantly wide range of internuclear distances. More than 200 weakly and strongly bound diatomics have been studied, including neutral and singly-charged diatomics (e.g., H2, Li2, LiH, Cd2, Na + 2 , and RbH − ), long-range bound diatomics (e.g., NaAr, CdNe, He2, CaHe, SrHe, and BaHe), metastable molecular dications (e.g., BeH++ , AlH ++ , Mg ++ 2 , and LiBa ++ ), and molecular trications (e.g., YHe+++ and ScHe +++ ).PACS numbers: 34.20.-b, 33.15.-e, 21.45.+v, 36.40.-c, 83.10.-y, 82.20.-w Modeling the interaction potential of diatomic systems is of fundamental importance to many issues [1,2,3,4,5,6,7,8], including atom-atom collisions, molecular spectroscopy, prediction of cluster structures, molecular dynamics simulation, chemical reactivity, matter-wave interferometry, and transport properties for more complex systems. Also of great interest are the potential functions for long-lived metastable doubly-or multiplycharged ions [9] that are relevant to high-density energy storage materials and to characterization and analytical methods for biosystems.Modern spectroscopy, diffraction, and scattering techniques [1, 3] provide a direct experimental approach to studies of interaction potentials of diatomic systems. In particular, diatomic potentials can be inferred from the spectroscopy data by three general approaches [10]: (i) the Wentzel-Kramers-Brillouin (WKB) Rydberg-KleinRees (RKR) method, (ii) the WKB-based Dunham approach, and (iii) semiempirical or empirical procedures. On the theoretical side, a diatomic potential curve may be predicted directly by ab initio calculations [11] and quantum Monte Carlo simulations [12]. These theoretical methods can, in principle, be very accurate when sufficient electronic configurations are included in the calculations, but can be prohibitively expensive in weakly bound systems [2] and/or many-electron systems [3].Numerous attempts to analytically model diatomic potentials have been made [3,5,10,13,14,15,16]. The well-known potential functions include Morse, Born-Mayer, Hulburt-Hirschfelder, Rosen-Morse, Rydberg, Pöschl-Teller, Linnett, Frost-Musulin, Varshni III, Lippincott, Lennard-Jones, and Maitland-Smith potentials [3,10], as well as the celebrated Tang-Toennies potential [5] and the recently proposed Morse-based potentials [13]. These potentials usually aim to describe either strongly or weakly bound, neutral or singlycharged diatomics and often lose their validity for either small or relatively large internuclear distance (denoted R hereafter). Thus, recent effort has been devoted to the construction of hybrid potentials, which use different functions for different interaction regions of The goal of this Letter is twofold. First, we propose a molecular-orbital theory based approach to obtain a very simple analytical potential of diatomic systems. ...

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Multiply charged molecules

Cited by 211 publications

References 199 publications

Collision complexes in dissociative single electron transfer between Ne2+ and N2

Collision complexes in dissociative single electron transfer between Ne2+ and N2

Characterization of doping levels in heteronuclear, gas-phase, van der Waals clusters and their energy absorption from an intense optical field

Simple Three-Parameter Model Potential for Diatomic Systems: From Weakly and Strongly Bound Molecules to Metastable Molecular Ions

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