Electron transport, attachment and ionization in c-C4F8 and iso-C4F8

Naidu, M. S.; Prasad, Awadhesh; Craggs, J D

doi:10.1088/0022-3727/5/4/313

Cited by 33 publications

(34 citation statements)

References 8 publications

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“…Novak and Fréchette 11 and Itoh et al 38 arrived at similar estimates of the MTCS based on electron swarm measurements. 25 The MTCS of Itoh et al has constant values of 80ϫ10 Ϫ16 cm 2 below 4 eV and 14ϫ10 Ϫ16 cm 2 above 11 eV, with a smooth interpolation in between, and is thus much larger than the present MTCS at low energy and much smaller at high energy.…”

Section: Resultscontrasting

confidence: 53%

“…At higher energies, several resonant peaks are observed in dissociative attachment, with F Ϫ being by far the principal ionic fragment produced, 5 although larger anions are also formed. Swarm parameters ͑drift velocities and ionization and attachment coefficients͒ were measured by Naidu et al 25 Yamaji et al 26 have also carried out swarm measurements on dilute mixtures of c-C 4 F 8 in argon.…”

Section: Introductionmentioning

confidence: 99%

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Electron collisions with octafluorocyclobutane, c-C4F8

Winstead¹,

McKoy²

2001

The Journal of Chemical Physics

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Articles you may be interested in Two-dimensional spectra of electron collisions with acrylonitrile and methacrylonitrile reveal nuclear dynamics J. Chem. Phys. 142, 184307 (2015) We present calculated cross sections for elastic and inelastic collisions of low-energy electrons with octafluorocyclobutane, c-C 4 F 8 . The integral elastic cross section displays a rich resonance structure, which we analyze in terms of temporary trapping in virtual valence orbitals. The differential elastic cross sections compare well with recent measurements at energies where the approximations used in the calculations are expected to be valid. Integral and differential cross sections for electron-impact excitation of the lowest singlet and triplet excited states were obtained. We relate the small magnitude of the inelastic integral cross sections and the unusual form of the inelastic differential cross sections to the symmetries of the electronic states involved in the transition.

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Section: Resultscontrasting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Electron collisions with octafluorocyclobutane, c-C4F8

Winstead¹,

McKoy²

2001

The Journal of Chemical Physics

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“…One possible explanation for this effect has been provided by Hunter et al [16] who, in their study of 1-C 3 F 6 found the electron attachment rate constant anomalously dependent on gas pressure, and established the hypothesis of temporary resonant trapping of the electrons via excited dimer ions. Even though Naidu et al [17] did not report any particular dependence of v e with pressure, they did observe a marked pressure dependence in the ratio of the electron diffusion to mobility coefficient D/K e , this difference being enhanced for E/N > 360 Td, which although indirectly, would suggest some pressure dependence of v e . Moreover, below this value, both curves merge into a single one.…”

Section: Electron Transport In C-c 4 Fmentioning

confidence: 82%

Morphology Control of Oxadiazole Compounds by Introduction of Amine Moieties

Mochizuki¹,

Hasui

Ikeda

2005

Jpn. J. Appl. Phys.

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This paper deals with the presentation and discussion of some recent measurements on the interaction of electron and ion swarms in gases, with particular emphasis on flourinated gases. The processes to be discussed are related to electron impact ionization and attachment, including Penning ionization and electron detachment. Electron transport is discussed in mixtures of SF 6 and fluorocarbon gases, where interesting regions of negative differential conductivity have been observed in C 2 F 4 , and apparent pressure dependences of the drift velocity in C 4 F 8 . Ion transport is discussed in terms of recent measurements on positive and negative ions in SF 6 and Ar. Finally, the subject of ion-molecule reactions is illustrated with the dissociation and charge transfer processes of daughter ions in nitrogen. Throughout the paper, the advantages and limitations of both the pulsed Townsend technique and the drift tube-mass spectrometer are highlighted.

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“…The percentage decreases with increasing field. All calculations presented below were performed for the value 2.8 x 10-15 cm z • Figure 3 shows a comparison be-0 / Naidu et al [37]. Solid lines show present calculations.…”

Section: Ionizaton (A) and Attachment ( N ) Coefficients Of Cclzfzmentioning

confidence: 99%

Insulating properties of mixtures of nitrogen with electronegative gases

Novák

Fréchette

1984

1984 IEEE International Conference on Eletrical Insulation

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Calculations of the transport coefficients of insulating electronegative gases and their mixtures were performed under the conditions of the Townsend steadystate experiment.The Boltzmann equation was used for evaluation of the unknown collision cross sections by fitting calculated ionization coefficients, drift velocities and diffusion coefficients to experimental data.A stainless-steel vacuum chamber (lO-s torr), provided with a pair of Rogowski-profile electrodes, was set up and used to carry out a series of measurements. The ionization and attachment coefficients were evaluated from the steady-state prebreakdown currents. Results for SF6 are presented in this paper.

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Electron transport, attachment and ionization in c-C4F8 and iso-C4F8

Cited by 33 publications

References 8 publications

Electron collisions with octafluorocyclobutane, c-C4F8

Electron collisions with octafluorocyclobutane, c-C4F8

Morphology Control of Oxadiazole Compounds by Introduction of Amine Moieties

Insulating properties of mixtures of nitrogen with electronegative gases

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