Collisions of doubly charged nitrogen molecules with rare gas atoms

Koslowski, H. R.; Lebius, H.; Staemmler, Volker; Fink, Richard D.; Wiesemann, K.; Huber, B. A.

doi:10.1088/0953-4075/24/23/027

Cited by 34 publications

(19 citation statements)

References 30 publications

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“…Electron transfer reactions of N 2 2+ with the rare gases have been reported as part of translational energy spectroscopic investigations of the electronic structure of the target dication. 14,15,96 In addition, electron transfer reactions between N 2 2+ and O 2 have also been studied by Kamber et al 97 However, no observation of a bond-forming channel was reported by Kamber et al, 97 whose experiments were carried out at significantly larger collision energies than those described in this paper. Our PSCO experiments extend the initial observations of Dutuit and Thissen 95 and show that NO + is formed following collisions of N 2 2+ with O 2 via two channels:…”

Section: Introductionmentioning

confidence: 73%

“…14,15,51,53,97 Hence in the remainder of this paper we focus on the bond-forming reactions, reactions ͑25͒ and ͑26͒. Figure 3 shows the relative intensity of the chemical reaction forming NO + and O + ͓reaction ͑25͔͒ with respect to the intensity of a dissociative electron transfer reaction ͓re-action ͑23͔͒ as a function of collision energy.…”

Section: A Relative Intensities Of the Different Reactive Channelsmentioning

confidence: 99%

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The formation of NO+ from the reaction of N22+ with O2

Ricketts

Harper

et al. 2005

The Journal of Chemical Physics

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Guided-ion beam study of the O 2 + +C 2 H 2 charge-transfer and chemical reaction channels J. Chem. Phys. 110, 4291 (1999) We have studied the potentially ionospherically significant reaction between N 2 2+ with O 2 using position-sensitive coincidence spectroscopy. We observe both nondissociative and dissociative electron transfer reactions as well as two channels involving the formation of NO + . The NO + product is formed together with either N + and O in one bond-forming channel or O + and N in the other bond-forming channel. Using the scattering diagrams derived from the coincidence data, it seems clear that both bond-forming reactions proceed via a collision complex ͓N 2 O 2 ͔ 2+ . This collision complex then decays by loss of a neutral atom to form a daughter dication ͑NO 2 2+ or N 2 O 2+ ͒, which then decays by charge separation to yield the observed products.

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Section: Introductionmentioning

confidence: 73%

Section: A Relative Intensities Of the Different Reactive Channelsmentioning

confidence: 99%

The formation of NO+ from the reaction of N22+ with O2

Ricketts

Harper

et al. 2005

The Journal of Chemical Physics

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“…Double ionization of N 2 by electron impact has been studied by Märk (1975) from threshold (∼ 43 eV) to 170 eV. Ab initio calculations include, for example, those by Wetmore and Boyd (1986), Taylor and Partridge (1987), Koslowski et al (1991), and Mathur et al (1995). Figure 14 from Lundqvist et al (1996) shows some of the lowlying potential curves of N ++ 2 , and indicates the Franck-Condon region from the ground state of N 2 .…”

Section: The Auger Effect and Double Valence Shell Ionization In Molementioning

confidence: 99%

Energy Deposition in Planetary Atmospheres by Charged Particles and Solar Photons

2008

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We discuss here the energy deposition of solar FUV, EUV and X-ray photons, energetic auroral particles, and pickup ions. Photons and the photoelectrons that they produce may interact with thermospheric neutral species producing dissociation, ionization, excitation, and heating. The interaction of X-rays or keV electrons with atmospheric neutrals may produce core-ionized species, which may decay by the production of characteristic X-rays or Auger electrons. Energetic particles may precipitate into the atmosphere, and their collisions with atmospheric particles also produce ionization, excitation, and heating, and auroral emissions. Auroral energetic particles, like photoelectrons, interact with the atmospheric species through discrete collisions that produce ionization, excitation, and heating of the ambient electron population. Auroral particles are, however, not restricted to the sunlit regions. They originate outside the atmosphere and are more energetic than photoelectrons, especially at magnetized planets. The spectroscopic analysis of auroral emissions is discussed here, along with its relevance to precipitating particle diagnostics. Atmospheres can also be modified by the energy deposited by the incident pickup ions with energies of eV's to MeV's; these particles may be of solar wind origin, or from a magnetospheric plasma. When the modeling of the energy deposition of the plasma is calculated, the subsequent modeling of the atmospheric processes, such as chemistry, emission, and the fate of hot recoil particles produced is roughly independent of the exciting radiation. However, calculating the spatial distribution of the energy deposition versus depth into the atmosphere produced by an incident plasma is much more complex than is the calculation of the solar excitation profile. Here, the nature of the energy deposition processes by the incident plasma are described as is the fate of the hot recoil particles produced by exothermic chemistry and by knock-on collisions by the incident ions.

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“…According to eq 6, this corresponds to an exothermicity of about 4.4 eV. Values in this range already have been found for a few molecular dications [14][15][16][17][18][19][20][21]. In the NH~+ --+ NH; case, for example, an optimum exothermicity of 4.5 eV was deduced [21].…”

Section: Methodsmentioning

confidence: 65%

“…The amount of internal energy can be modulated by change of the collision gas (target gas). For exothermic charge exchange, evidence has been found of a "reaction window," where the cross section is maximum [9][10][11][12][13][14][15][16][17][18][19][20][21]. However, endothermic charge exchange, for which energy has to be borrowed from the translational motion, leads to internally excited ions, which dissociate with large yields [21].…”

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confidence: 99%

Mechanisms of single-electron capture by the dichlorocarbene dication

Leyh

Hautot

1996

J. Am. Soc. Mass Spectrom.

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The single-electron capture (SEC) by dichlorocarbene dications with eight different atomic and molecular target gases, CCl 2 (2+) + G → CCl 2 (+) + G(+), has been studied by product ion spectroscopy and ion kinetic energy spectroscopy. The experimental data have been interpreted in the framework of a theoretical model mat describes the charge exchange process. Exothermic charge exchange is handled within the Landau-Zener model, whereas endothermic charge exchange is described by the Demkov model. The calculated data reproduce qualitatively the essential features of the experimental results: (1) the appearance of a reaction window centered at an exothermicity in the 4-4.5-eV range, (2) the lower SEC cross sections for endothermic charge exchange, (3) the wider internal energy distributions obtained for CCl 2 (+) in the endothermic regime than in the exothermic one, which results in larger dissociation yields, (4) the excitation of molecular targets that accompany their ionization in the SEC process, and (5) the kinetic energy released on the CCl(+) + Cl fragments in dissociative SEC.

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Collisions of doubly charged nitrogen molecules with rare gas atoms

Cited by 34 publications

References 30 publications

The formation of NO+ from the reaction of N22+ with O2

The formation of NO+ from the reaction of N22+ with O2

Energy Deposition in Planetary Atmospheres by Charged Particles and Solar Photons

Mechanisms of single-electron capture by the dichlorocarbene dication

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