KINETIC ENERGY DISTRIBUTION OF H(1s) FROM H2X1Σ+g-a3Σ+gEXCITATION AND LIFETIMES AND TRANSITION PROBABILITIES OFa3Σ+g(v,J)

Liu, Xianming; Johnson, P. V.; Malone, C. P.; Young, Jason A.; Kanik, I.; Shemansky, D. E.

doi:10.1088/0004-637x/716/1/701

Cited by 11 publications

(8 citation statements)

References 89 publications

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“…) and an appropriate rotational factor (or a sum of rotational factors). The rotational factor for different electronic excitations of H 2 have been given in Liu et al [32][33][34][35][36]. The electronic form factor, which accounts for magnitude and excitation energy dependence of the cross section, can be considered as a common factor for a given electronic excitation at a given energy.…”

Section: Data Acquisition and Analysismentioning

confidence: 99%

Differential cross sections for excitation of H₂by low-energy electron impact

Hargreaves

Bhari

Adjari

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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Experimental and theoretical differential cross sections (DCS) for the electron-impact excitation of molecular hydrogen to the S + B u, and thestates are presented at incident energies near to threshold. The experimental DCSs were taken at incident energies of 14, 15, 16 and 17.5 eV and for scattering angles from 10°to 130°. The theoretical DCSs are from the convergent close-coupling method which has recently successfully modeled differential electron scattering from H 2 when compared with available experiment at energies of 17.5 eV and above.

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Section: Data Acquisition and Analysismentioning

confidence: 99%

Differential cross sections for excitation of H₂by low-energy electron impact

Hargreaves

Bhari

Adjari

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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“…Since most of the predissociation of singlet ungerade states are either directly or indirectly caused by the coupling with the B 1 + u continuum, the kinetic energy distribution of atomic hydrogen generated from predissociative excitation should be similar to that of the B 1 + u continuum. Dissociative emission tends to produce slower atomic hydrogen than all other dissociative processes (Abgrall et al 1997, Liu et al 2010b. The reason is that for a given discrete (v j , J j ) level, the sum of the emitted photon energy and the kinetic energy of atomic hydrogen fragments is a constant.…”

Section: Discussionmentioning

confidence: 99%

Electron and photon dissociation cross sections of the D₂singlet ungerade continua

Liu¹,

Shemansky²,

Johnson³

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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The dissociation of H2 and its isotopologues through excitation to the singlet ungerade continua is one of the major channels for the production of slow hydrogen atoms at high temperature (T > 10 000 K) and electron energy >25 eV. State-specific photodissociation cross sections and oscillator strengths for molecular deuterium from the X 1Σ+g(vi, Ji) levels to the continuum levels of the B 1Σ+u, C 1Πu, B′ 1Σ+u, D 1Πu, B, D′ 1Πu and 5pσ 1Σ+u states have been calculated. The corresponding (vi, Ji) state-specific electron impact dissociation cross sections have been obtained for the first time over a wide energy range using calculated continuum oscillator strengths along with previously published excitation functions of the Lyman and Werner bands. Estimated cross sections to the higher (n ⩾ 5) npσ 1Σ+u and npπ 1Πu continua are also provided. Both photon and electron impact excitation cross sections show strong dependences on the initial (vi, Ji) quantum numbers. Thermally averaged electron impact cross sections of all singlet ungerade states increase monotonically with temperature. While excitation to the B′ 1Σ+u continuum is the dominant dissociation channel at room temperature, the C 1Πu and B 1Σ+u continua become more important at high temperature (>5000 K). The large increase of the C 1Πu and B 1Σ+u cross sections with (vi, Ji) is primarily responsible for making the continuum dissociation from a minor break-up channel at room temperature into a major one at high temperature. The electron dissociation cross section of D2 via the singlet ungerade continua is smaller than its H2 counterpart, although this difference decreases with temperature. This work, along with the previous calculations of H2 by Liu et al (2009, 2012), provides the complete electron impact dissociation cross sections of H2 and D2 through the singlet ungerade continua. Thermally averaged electron dissociation cross sections are provided at various temperatures for applications in plasma physics.

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“…The OES observations revealed two pathways by which the dissociation of H2 molecule into a ground state H atom proceeds in a DBD plasma [23]. (1) The ground state H2 molecule is excited to the a 3 ∑g + state via a non-elastic collision with an electron, the excited H2 molecule, in an a 3 ∑g + state, transitions to the first excited state (b 3 ∑u + ).…”

Section: The Dissociation Of H2 In Dbd Reactor and The Relationship B...mentioning

confidence: 99%

“…从物理学上讲, H α 谱线的强度与等离子体中基态氢原子浓度有关 [22] . 尽管等离子体中的电子温度, 或者说 OES诊断揭示出以下两种氢分子解离为氢原子的途径 [23] . 一是基态氢分子通过与电子碰撞获得能量变成…”

Section: 在介质阻挡放电条件下Hunclassified

The catalytic effect of H2 in the dehydrogenation coupling production of ethylene glycol from methanol using a dielectric barrier discharge

Zhang

Wang

et al. 2015

Chinese Journal of Catalysis

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KINETIC ENERGY DISTRIBUTION OF H(1s) FROM H₂X¹Σ⁺_g-a³Σ⁺_gEXCITATION AND LIFETIMES AND TRANSITION PROBABILITIES OFa³Σ⁺_g(v,J)

Cited by 11 publications

References 89 publications

Differential cross sections for excitation of H₂by low-energy electron impact

Differential cross sections for excitation of H₂by low-energy electron impact

Electron and photon dissociation cross sections of the D₂singlet ungerade continua

The catalytic effect of H2 in the dehydrogenation coupling production of ethylene glycol from methanol using a dielectric barrier discharge

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KINETIC ENERGY DISTRIBUTION OF H(1s) FROM H2X1Σ+g-a3Σ+gEXCITATION AND LIFETIMES AND TRANSITION PROBABILITIES OFa3Σ+g(v,J)

Cited by 11 publications

References 89 publications

Differential cross sections for excitation of H2by low-energy electron impact

Differential cross sections for excitation of H2by low-energy electron impact

Electron and photon dissociation cross sections of the D2singlet ungerade continua

The catalytic effect of H2 in the dehydrogenation coupling production of ethylene glycol from methanol using a dielectric barrier discharge

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Product

Resources

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KINETIC ENERGY DISTRIBUTION OF H(1s) FROM H₂X¹Σ⁺_g-a³Σ⁺_gEXCITATION AND LIFETIMES AND TRANSITION PROBABILITIES OFa³Σ⁺_g(v,J)

Differential cross sections for excitation of H₂by low-energy electron impact

Differential cross sections for excitation of H₂by low-energy electron impact

Electron and photon dissociation cross sections of the D₂singlet ungerade continua