Simple systematization of vibrational excitation cross-section calculations for resonant electron-molecule scattering in the boomerang and impulse models

2007 ◽  
Vol 126 (4) ◽  
pp. 044309 ◽  
Author(s):  
Manabendra Sarma ◽  
S. Adhikari ◽  
Manoj K. Mishra
Keyword(s):  
Cross Section ◽  
Excitation Cross Section ◽  
Vibrational Excitation ◽  
Resonant Electron ◽  
Molecule Scattering

scholarly journals A Study of the Vibrational Excitation of H2 by Measurements of the Drift Velocity of Electrons in H2−Ne Mixtures

1988 ◽  
Vol 41 (4) ◽  
pp. 573 ◽  
Author(s):  
JP England ◽  
MT Elford ◽  
RW Crompton
Keyword(s):  
Cross Section ◽  
Drift Velocity ◽  
Cross Sections ◽  
Excitation Cross Section ◽  
Vibrational Excitation ◽  
Pure Hydrogen ◽  
Velocity Data ◽  
Highly Sensitive ◽  
Hydrogen Mixtures ◽  
Made In

Measurements of electron drift velocities have been made in 1�160% and 2�892% hydrogen-neon mixtures at 294 K and values of EI N from 0�12 to 1�7 Td. The measurements are highly sensitive to the region of the threshold of the v = 0 → 1 vibrational excitation cross section for hydrogen and have enabled more definitive tests of proposed cross sections to be made than was possible using drift velocity data for H2−He and H2−Ar mixtures. The theoretical v = 0 → 1 vibrational excitation cross section of Morrison et al. (1987) is shown to be incompatible with the present measurements. A new set of hydrogen cross sections has been derived from the available electron swarm measurements in pure hydrogen and hydrogen mixtures.

scholarly journals Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 64
Author(s):  
Luis A. Poveda ◽  
Marcio T. do N. Varella ◽  
José R. Mohallem
Keyword(s):  
Wave Packet ◽  
Cross Section ◽  
Energy Surface ◽  
Excitation Cross Section ◽  
Vibrational Mode ◽  
Vibrational Excitation ◽  
Spherically Symmetric ◽  
Positron Impact ◽  
Wave Packet Dynamics ◽  
Good Agreement

The vibrational excitation cross-section of a diatomic molecule by positron impact is obtained using wave-packet propagation techniques. The dynamics study was carried on a two-dimensional potential energy surface, which couples a hydrogenlike harmonic oscillator to a positron via a spherically symmetric correlation polarization potential. The cross-section for the excitation of the first vibrational mode is in good agreement with previous reports. Our model suggests that a positron couples to the target vibration by responding instantly to an interaction potential, which depends on the target vibrational coordinate.

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