Elastic and rotational excitation cross sections for electron-nitrous oxide collisions

2003 ◽  
Vol 95 (3) ◽  
pp. 260-266 ◽  
Author(s):  
M.-T. Lee ◽  
I. Iga ◽  
L. M. Brescansin ◽  
L. E. Machado
Keyword(s):  
Nitrous Oxide ◽  
Cross Sections ◽  
Rotational Excitation ◽  
Excitation Cross Sections

Rotational excitation cross sections in e+-H 2 + scattering

1994 ◽  
Vol 89 (1) ◽  
pp. 419-424 ◽  
Author(s):  
T. Mukherjee ◽  
D. Basu ◽  
A. S. Ghosh
Keyword(s):  
Cross Sections ◽  
Rotational Excitation ◽  
Excitation Cross Sections

scholarly journals Applications of the Schwinger Multichannel method with pseudopotentials to electron scattering from polyatomic molecules II: rotational excitation cross sections

2001 ◽  
Vol 31 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Márcio T. do N. Varella ◽  
Márcio H. F. Bettega ◽  
Alexandra P. P. Natalense ◽  
Luiz G. Ferreira ◽  
Marco A. P. Lima
Keyword(s):  
Electron Scattering ◽  
Cross Sections ◽  
Polyatomic Molecules ◽  
Rotational Excitation ◽  
Excitation Cross Sections

scholarly journals Rotational and Vibrational Excitation of Nitrogen by Electron Impact

1997 ◽  
Vol 50 (3) ◽  
pp. 441 ◽  
Author(s):  
A. G. Robertson ◽  
M. T. Elford ◽  
R. W. Crompton ◽  
Michael A. Morrison ◽  
Weiguo Sun ◽  
...  
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Unsolved Problem ◽  
Vibrational Excitation ◽  
Rotational Excitation ◽  
Early Analysis ◽  
Excitation Cross Sections ◽  
Low Energy Electron ◽  
Experimental Values ◽  
Best Fit

Rotational excitation of nitrogen by low-energy electron impact has posed an unsolved problem for more than three decades. Early analysis of the results of swarm experiments in nitrogen found that the data could be matched remarkably well by assuming that the energy dependences of the Δj = 2 cross sections from threshold to a few tenths of an eV are given by a simple formula based on the Born approximation. Moreover, the quadrupole moment (the only adjustable parameter in the formula) which gave the best fit to the data was commensurate with existing experimental values. This finding posed an enigma, since the quadrupole Born expression is known to incorrectly represent the interaction potential for scattering except within a few meV of threshold. We have analysed new swarm data, taken in a dilute mixure of nitrogen in neon, using theoretical rotational and momentum transfer cross sections based on a solution of the Schrödinger equation using static, exchange, and polarisation potentials. This work explains the long-standing enigma and provides the basis for a subsequent analysis in which theoretical vibrational excitation cross sections are also investigated using the new swarm data for the mixture.

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