Cross Sections and Related Data for Electron Collisions with Hydrogen Molecules and Molecular Ions

Tawara, H.; Itikawa, Yukikazu; Nishimura, Hiroyuki; Yoshino, Masafumi

doi:10.1063/1.555856

Cited by 349 publications

(210 citation statements)

References 4 publications

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“…Isotope effects of electron-H 2 collision processes such as excitation and dissociation have been reported. [24][25][26] One theoretical study focused on the isotope effects on the dissociation process of D 2 and H 2 through the ground state ͑X 1 ͚ g + ͒ to the first excited state ͑b 3 ͚ u + ͒ including vibrational levels. 24 Their calculations revealed a larger cross section of D 2 than that of H 2 , because the density of the states of the dissociation channel differs between H 2 and D 2 due to the energy difference of their vibrational levels.…”

Section: Resultsmentioning

confidence: 99%

Isotope effects between hydrogen and deuterium microwave plasmas on chemical vapor deposition homoepitaxial diamond growth

Mizuochi

Isoya

Niitsuma

et al. 2007

Journal of Applied Physics

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This article shows that replacing hydrogen with deuterium improves the quality of microwave plasma-assisted chemical vapor deposition homoepitaxial diamond. Suppression of point defects in the bulk and of nonepitaxial crystallites and increasing of free-exciton emission intensity were revealed by electron paramagnetic resonance, optical microscopy, and cathodoluminescence, respectively. The isotope effects on the etching rate of diamond by deuterium are also revealed. The isotope effects are discussed from the viewpoint of etching effects.

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Section: Resultsmentioning

confidence: 99%

Isotope effects between hydrogen and deuterium microwave plasmas on chemical vapor deposition homoepitaxial diamond growth

Mizuochi

Isoya

Niitsuma

et al. 2007

Journal of Applied Physics

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“…There is also a useful review by Tawara et al (1990a), which unfortunately does not include tabulated data. It is important to keep in mind that the dissociation energy of molecular hydrogen is about 4.5 eV, therefore Table 3 lists the various inelastic interactions along with their associated energy loss terms.…”

Section: Hydrogenmentioning

confidence: 99%

“…Summing over Magboltz cross sections to give an appropriate comparison shows large differences between the compilations, exceeding a factor of 2 in some cases. Tawara et al (1990b) also published a review in 1990, but does not include tabulated data and does not recommend any electronic transitions. Table 5 lists the various inelastic interactions along with their associated energy loss terms.…”

Section: Methanementioning

confidence: 99%

Physical Processes Related to Discharges in Planetary Atmospheres

Roussel-Dupré

Colman

Symbalisty

et al. 2008

Space Sciences Series of ISSI

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This paper focuses on the rudimentary principles of discharge physics. The kinetic theory of electron transport in gases relevant to planetary atmospheres is examined and results of detailed Boltzmann kinetic calculations are presented for a range of applied electric fields. Comparisons against experimental swarm data are made. Both conventional breakdown and runaway breakdown are covered in detail. The phenomena of transient luminous events (TLEs), particularly sprites, and terrestrial gamma-ray flashes (TGFs) are discussed briefly as examples of discharges that occur in the terrestrial environment. The observations of terrestrial lightning that exist across the electromagnetic spectrum and presented throughout this volume fit well with the broader understanding of discharge physics that we present in this paper. We hope that this material provides the foundation on which explorations in search of discharge processes on other planets can be based and previous evidence confirmed or refuted.R. Roussel-Dupré ( ) · J.J. Colman · E. Symbalisty

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“…12 Note that H 2 ϩ can easily form H 3 ϩ when reacting with H 2 and this again leads to the formation of a H atom…”

Section: A Plasma Source and Plasma Jetmentioning

confidence: 99%

Influence of surface chemistry on the transport of H atoms in a supersonic hydrogen plasma jet

et al. 2001

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The transport of ground-state hydrogen atoms in the expansion of a thermal hydrogen plasma created by a cascaded arc is studied by means of two-photon absorption laser induced fluorescence. The low-dissociation degree measured at the source exit implies that H atoms flow in a H 2 environment. It is shown that the H atom expansion pattern is in disagreement with the neutral gas supersonic expansion theory. Indeed the transport of H atoms in the plasma jet is strongly influenced by surface-recombination processes. Because of the large density gradients between the core of the jet and its surroundings induced by the recombination of H atoms at the reactor walls, hydrogen atoms diffuse out of the plasma jet in the course of the expansion. When the surface loss probability is high, i.e., the combination of a large wall-recombination probability with a long residence time, the losses of radicals by diffusion cannot be avoided even when the mass of the carrier gas is close to the mass of the radical.

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Cross Sections and Related Data for Electron Collisions with Hydrogen Molecules and Molecular Ions

Abstract: Data are compiled and evaluated for collision processes of excitation, dissociation, ionization, attachment, and recombination of hydrogen molecules and molecular ions (H 2+ , H 3+) by electron impact as well as for properties of their collision products.

Cited by 349 publications

References 4 publications

Isotope effects between hydrogen and deuterium microwave plasmas on chemical vapor deposition homoepitaxial diamond growth

Isotope effects between hydrogen and deuterium microwave plasmas on chemical vapor deposition homoepitaxial diamond growth

Physical Processes Related to Discharges in Planetary Atmospheres

Influence of surface chemistry on the transport of H atoms in a supersonic hydrogen plasma jet

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