CROSS SECTION DATA FOR ELECTRON-IMPACT INELASTIC PROCESSES OF VIBRATIONALLY EXCITED MOLECULES OF HYDROGEN AND ITS ISOTOPES

New results for the total neutral dissociation cross section and an estimate of the gross cross section for the production of neutral fluorine by electron impact on CF4 have been obtained by combining previously reported results for the total dissociation cross section and the counting cross section for the total dissociative ionisation. This advancement was made possible by recently reported results for multication formation obtained from coincidence experiments. The estimate of the neutral fluorine production cross section is of the same order of magnitude as the total dissociation cross section itself, a similarity which may explain why CF4 is such an effective etching gas. The available cross section data for electron impact energies between 5 and 200 e V are reviewed.

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Recommended Cross Section Data for Carbon Ions and Atoms: Electron-impact Excitation, Ionization and Charge Exchange

Journal of Physics Conference Series ◽

10.1088/1742-6596/72/1/012018 ◽

2007 ◽

Vol 72 ◽

pp. 012018 ◽

Cited By ~ 2

Author(s):

Hiroya Suno ◽

Takako Kato

Keyword(s):

Electron Impact ◽

Cross Section ◽

Charge Exchange ◽

Impact Excitation ◽

Electron Impact Excitation ◽

Carbon Ions ◽

Cross Section Data ◽

Section Data

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Rate coefficients for electron-impact dissociation of O3+ to singly charged fragments

Journal of the Serbian Chemical Society ◽

10.2298/jsc211109110b ◽

2021 ◽

pp. 110-110

Author(s):

Dragoljub Belic ◽

Mirjana Vojnovic ◽

Miroslav Ristic ◽

Xavier Urbain ◽

Pierre Defrance

Keyword(s):

Energy Distribution ◽

Electron Impact ◽

Cross Section ◽

Distribution Functions ◽

Rate Coefficients ◽

Cross Section Data ◽

Thermal Electron ◽

Section Data ◽

Electron Impact Dissociation ◽

Energy Distribution Functions

Rate coefficients for electron-impact dissociation of O3+ to the O+ and O2+ fragments are calculated for the new, recommended cross section data set and for various collisional conditions. Two sets of the cross section data, measured recently by different experimental groups, are used. These cross sections differ significantly with each other, but are renormalized and optimized to the coherent data base. Rate coefficients for the ozone cation fragmentation are determined using the Maxwellian and the non-thermal electron energy distribution functions (EEDF). In the case of Maxwellian distribution, mean electron energies cover the range from zero up to 2 keV. Non-thermal electron energy distribution functions are adopted from the recent electron observations by the 3-D plasma and energetic particles experiment on the WIND spacecraft. The non-thermal rates are evaluated for the mean electron energies from 4 to 80 eV. The role of the possible contribution of electron-impact dissociation of O3+ to the Ozone layer depletion has been emphasized.

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Rate coefficients for electron-impact dissociation of O3+ to singly charged fragments

Journal of the Serbian Chemical Society ◽

10.2298/jsc2100110b ◽

2021 ◽

pp. 110-110

Author(s):

Dragoljub Belic ◽

Mirjana Vojnovic ◽

Miroslav Ristic ◽

Xavier Urbain ◽

Pierre Defrance

Keyword(s):

Energy Distribution ◽

Electron Impact ◽

Cross Section ◽

Distribution Functions ◽

Rate Coefficients ◽

Cross Section Data ◽

Thermal Electron ◽

Section Data ◽

Electron Impact Dissociation ◽

Energy Distribution Functions

Rate coefficients for electron-impact dissociation of O3+ to the O+ and O2+ fragments are calculated for the new, recommended cross section data set and for various collisional conditions. Two sets of the cross section data, measured recently by different experimental groups, are used. These cross sections differ significantly with each other, but are renormalized and optimized to the coherent data base. Rate coefficients for the ozone cation fragmentation are determined using the Maxwellian and the non-thermal electron energy distribution functions (EEDF). In the case of Maxwellian distribution, mean electron energies cover the range from zero up to 2 keV. Non-thermal electron energy distribution functions are adopted from the recent electron observations by the 3-D plasma and energetic particles experiment on the WIND spacecraft. The non-thermal rates are evaluated for the mean electron energies from 4 to 80 eV. The role of the possible contribution of electron-impact dissociation of O3+ to the Ozone layer depletion has been emphasized.

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Electron Impact Cross Section Data for Carbon Tetrafluoride

Japanese Journal of Applied Physics ◽

10.1143/jjap.33.4157 ◽

1994 ◽

Vol 33 (Part 1, No. 7B) ◽

pp. 4157-4164 ◽

Cited By ~ 98

Author(s):

Russell A. Bonham

Keyword(s):

Electron Impact ◽

Cross Section ◽

Cross Section Data ◽

Carbon Tetrafluoride ◽

Section Data

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Pooling of Time Series and Cross Section Data

Econometrica ◽

10.2307/1912807 ◽

1969 ◽

Vol 37 (3) ◽

pp. 552

Author(s):

V. K. Chetty

Keyword(s):

Time Series ◽

Cross Section ◽

Cross Section Data ◽

Section Data

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Calculation of Electron Impact Single Ionization TDCS of Tungsten Atoms at 200, 500 and 1000 eV

Atoms ◽

10.3390/atoms9020031 ◽

2021 ◽

Vol 9 (2) ◽

pp. 31

Author(s):

Ghanshyam Purohit

Keyword(s):

Electron Impact ◽

Cross Sections ◽

Projectile Energy ◽

Cross Section Data ◽

Scattered Electron ◽

Fusion Plasma ◽

Magnetic Devices ◽

Single Ionization ◽

Section Data ◽

Sensitive Dependence

We report triple differential cross-sections (TDCSs) for the electron impact single ionization of tungsten atoms for the ionization taking place from the outer sub shells of tungsten atoms, viz. W (6s), W (5d), W (5p) and W (4f). The study of the electron-induced processes such as ionization, excitation, autoionization from tungsten and its charged states is strongly required to diagnose and model the fusion plasma in magnetic devices such as Tokamaks. Particularly, the cross-section data are important to understand the electron spectroscopy involved in the fusion plasma. In the present study, we report TDCS results for the ionization of W atoms at 200, 500 and 1000 eV projectile energy at different values of scattered electron angles. It was observed that the trends of TDCSs for W (5d) are significantly different from the trends of TDCSs for W (6s), W (5p) and W (4f). It was further observed that the TDCS for W atoms has sensitive dependence on value of momentum transfer and projectile energy.

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