Boltzmann equation analysis of electron-molecule collision cross sections in water vapor and ammonia

被引:134
作者
Yousfi, M
Benabdessadok, MD
机构
[1] Université Paul Sabatier, CPAT, U. Associée au CNRS no 277, 31062 Toulouse Cédex
关键词
D O I
10.1063/1.363785
中图分类号
O59 [应用物理学];
学科分类号
摘要
Sets of electron-molecule collision cross sections for H2O and NH3 have been determined from a classical technique of electron swarm parameter unfolding. This deconvolution method is based on a simplex algorithm using a powerful multiterm Boltzmann equation analysis established in the framework of the classical hydrodynamic approximation. It is well adapted for the simulation of the different classes of swarm experiments (i.e., time resolved, time of flight, and steady state experiments). The sets of collision cross sections that exist in the literature are reviewed and analyzed. Fitted sets of cross sections are determined for H2O and NH3 which exhibit features characteristic of polar molecules such as high rotational excitation collision cross sections. The hydrodynamic swarm parameters (i.e., drift velocity, longitudinal and transverse diffusion coefficients, ionization and attachment coefficients) calculated from the fitted sets are in excellent agreement with the measured ones. These sets are finally used to calculate the transport and reaction coefficients needed for discharge modeling in two cases of typical gas mixtures for which experimental swarm data are very sparse or nonexistent (i.e., flue gas mixtures and gas mixtures for rf plasma surface treatment). (C) 1996 American Institute of Physics.
引用
收藏
页码:6619 / 6630
页数:12
相关论文
共 98 条
[1]  
Bailey VA, 1930, PHILOS MAG, V10, P145
[2]   IONIZATION OF AMMONIA BY ELECTRON-IMPACT AT 25-1000 EV [J].
BEDERSKI, K ;
WOJCIK, L ;
ADAMCZYK, B .
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, 1980, 35 (1-2) :171-178
[3]   DISSOCIATIVE EXCITATION OF WATER BY ELECTRON-IMPACT [J].
BEENAKKER, CIM ;
DEHEER, FJ ;
KROP, HB ;
MOHLMANN, GR .
CHEMICAL PHYSICS, 1974, 6 (03) :445-454
[4]   ANGULAR AND ENERGY-DEPENDENCE OF CROSS-SECTIONS FOR EJECTION OF ELECTRONS FROM WATER-VAPOR .1. 50-2000-EV ELECTRON-IMPACT [J].
BOLORIZADEH, MA ;
RUDD, ME .
PHYSICAL REVIEW A, 1986, 33 (02) :882-887
[6]  
BOSE N, 1971, Z NATURFORSCH PT A, VA 26, P1491
[7]  
Bruche E, 1929, ANN PHYS-BERLIN, V1, P93
[8]  
BUBERT H, 1971, J PHYS CHEM-US, V75, P769
[9]   THEORETICAL INTERPRETATION OF OPTICAL AND ELECTRON SCATTERING SPECTRA OF H2O [J].
CLAYDON, CR ;
SEGAL, GA ;
TAYLOR, HS .
JOURNAL OF CHEMICAL PHYSICS, 1971, 54 (09) :3799-&
[10]   NEGATIVE-ION FORMATION IN HIO AND D2O [J].
COMPTON, RN ;
CHRISTOPHOROU, LG .
PHYSICAL REVIEW, 1967, 154 (01) :110-+