Vibrational excitation coefficients for electrons in HBr

Šašić, Olivera; Petrović, Zoran Lj.

doi:10.1016/j.radphyschem.2005.09.022

Cited by 5 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electron impact ionization of a molecule represents a basic electron-molecule collision process important in many practical applications such as low-temperature processing plasmas [1][2][3], fusion-edge plasmas [4,5], gas discharges [6,7], radiation chemistry [8], mass spectrometry [9] and chemical analysis [10]. For example, the total cross sections for ionization of molecules by electron impact is one of the essential processes required in the modeling of a wide range of applications, such as plasma processing of semiconductor devices as it defines the number of charged particle balance and sustaining conditions for plasma operation.…”

Section: Introductionmentioning

confidence: 99%

Calculations of Cross Sections Data for Scattering of Electrons on HBr

Radmilović-Radjenović

Petrović

2010

Acta Phys. Pol. A

View full text Add to dashboard Cite

The R-matrix method provides a complete theoretical framework for the treatment of low energy electron collisions. The method has been implemented into code Quantemol-N (EE) with a goal to provide users in plasma modeling, swarm studies and other applications with an option to calculate the missing data. In this paper we report on cross sections and rate coefficients for hydrogen bromide obtained by using Quantemol-N. The total cross section has been calculated both with and without Born corrections.PACS numbers: 34.50.−s, 34.50.Gb IntroductionCollisions of electrons with atoms and molecules determine the behavior of plasmas. The electron impact ionization of a molecule represents a basic electron-molecule collision process important in many practical applications such as low-temperature processing plasmas [1-3], fusion-edge plasmas [4,5], gas discharges [6,7], radiation chemistry [8], mass spectrometry [9] and chemical analysis [10]. For example, the total cross sections for ionization of molecules by electron impact is one of the essential processes required in the modeling of a wide range of applications, such as plasma processing of semiconductor devices as it defines the number of charged particle balance and sustaining conditions for plasma operation. The importance of electron-molecule collisions has long been recognized and considerable progress in providing experimental data for electron-impact ionization cross sections for a broad range of molecular targets has been achieved in the past decade [11,12]. Nevertheless, the information on collision data and particularly complete sets of data for most reactive gases used in plasma processing are not available.Defining low energies as those when projectile electrons have an insufficient energy to ionize the target molecule, the following processes can occur: elastic scattering, electronic excitation, vibrational and rotational excitations, dissociative attachment/recombination and impact dissociation. A common feature of these processes is that they can be considered to proceed via a common intermediary [13]. The R-matrix method for treating electron--molecule collisions, used in this article, is designed to obtain accurate wavefunctions for this intermediary and can be used for the modeling the relevant processes. Although the loss of symmetry and increased degrees of freedom mean that electron-molecule collisions are significantly more difficult to treat theoretically than electron--atom collisions, the use of the R-matrix method to study

show abstract

Section: Introductionmentioning

confidence: 99%

Calculations of Cross Sections Data for Scattering of Electrons on HBr

Radmilović-Radjenović

Petrović

2010

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

A set of cross sections and transport coefficients for electrons in HBr

Šašić¹,

Dujko²,

Makabe³

et al. 2012

Chemical Physics

View full text Add to dashboard Cite

Measurement and interpretation of swarm parameters and their application in plasma modelling

Petrović¹,

Dujko²,

Marić³

et al. 2009

J. Phys. D: Appl. Phys.

220

208

View full text Add to dashboard Cite

In this review paper, we discuss the current status of the physics of charged particle swarms, mainly electrons, having plasma modelling in mind. The measurements of the swarm coefficients and the availability of the data are briefly discussed. We try to give a summary of the past ten years and cite the main reviews and databases, which store the majority of the earlier work. The need for reinitiating the swarm experiments and where and how those would be useful is pointed out. We also add some guidance on how to find information on ions and fast neutrals. Most space is devoted to interpretation of transport data, analysis of kinetic phenomena, and accuracy of calculation and proper use of transport data in plasma models. We have tried to show which aspects of kinetic theory developed for swarm physics and which segments of data would be important for further improvement of plasma models. Finally, several examples are given where actual models are mostly based on the physics of swarms and those include Townsend discharges, afterglows, breakdown and some atmospheric phenomena. Finally we stress that, while complex, some of the results from the kinetic theory of swarms and the related phenomenology must be used either to test the plasma models or even to bring in new physics or higher accuracy and reliability to the models.

show abstract

Vibrational excitation coefficients for electrons in HBr

Cited by 5 publications

References 14 publications

Calculations of Cross Sections Data for Scattering of Electrons on HBr

Calculations of Cross Sections Data for Scattering of Electrons on HBr

A set of cross sections and transport coefficients for electrons in HBr

Measurement and interpretation of swarm parameters and their application in plasma modelling

Contact Info

Product

Resources

About