scholarly journals Angular distributions in the elastic scattering and rotational excitation of molecular hydrogen by atomic hydrogen

1975 ◽  
Vol 199 ◽  
pp. 637 ◽  
Author(s):  
S.-I. Chu ◽  
A. Dalgarno
Keyword(s):  
Elastic Scattering ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Angular Distributions ◽  
Rotational Excitation

scholarly journals Theory of the elastic scattering of electrons in molecular hydrogen

1930 ◽  
Vol 129 (811) ◽  
pp. 616-627 ◽  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Hydrogen Molecule ◽  
Incident Beam ◽  
Quantum Mechanical ◽  
Experimental Conditions ◽  
Actual Case ◽  
Mechanical Methods

Since tbe introduction of quantum mechanical methods, the theory of scattering of electrons by atoms and ions has been developed very considerably. In the case of elastic collisions it is possible to determine the effective cross sections presented by atoms to a beam of electrons, from a knowledge of the potential in the atom. This has been done for helium by Mott and the calculated cross sections agree well with the experimental. Unfortunately, the simplest theoretical case, that of the elastic scattering of electrons by atomic hydrogen, the theory of which has been given by Elsasser, is extremely difficult to attain experimentally, 50 to 60 per cent, atomic hydrogen being the maximum at present attainable. It thus would seem of interest to consider what effects would be expected by using molecular instead of atomic hydrogem This case is also novel in that we are considering an axially symmetrical field and the number of electrons scattered through a given angle depends on the orientation of the axis relative to the initial and final beams. In an actual case the axes of the molecules may be taken as in random directions, the hydrogen molecule having no permanent dipole moment and so being only slightly oriented by the electric field of the incident beam. This permits us to average the scattering over all orientation to obtain experimental conditions.

scholarly journals Elastic scattering and rotational excitation of nitrogen molecules by sodium atoms

2011 ◽  
Vol 135 (17) ◽  
pp. 174301 ◽  
Author(s):  
Jérôme Loreau ◽  
Peng Zhang ◽  
Alexander Dalgarno
Keyword(s):  
Elastic Scattering ◽  
Rotational Excitation ◽  
Sodium Atoms

Electron Elastic Scattering Resonances in the Collision of Fast Hydrogenic Ions with Molecular Hydrogen

2001 ◽  
Vol T92 (1) ◽  
pp. 272-274 ◽  
Author(s):  
G. Toth ◽  
P. Zavodszky ◽  
C. P. Bhalla ◽  
P. Richard ◽  
S. Grabbe ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Molecular Hydrogen ◽  
Hydrogenic Ions ◽  
Scattering Resonances

scholarly journals Energy and angular distributions of electrons from ion impact on atomic and molecular hydrogen. IV. 28–114-keVHe++ H collisions

1996 ◽  
Vol 53 (1) ◽  
pp. 303-311 ◽  
Author(s):  
Y.-Y. Hsu ◽  
M. W. Gealy ◽  
G. W. Kerby ◽  
M. E. Rudd ◽  
D. R. Schultz ◽  
...  
Keyword(s):  
Molecular Hydrogen ◽  
Angular Distributions ◽  
Ion Impact ◽  
Energy And Angular Distributions

Further investigations of charge exchange and electron detachment - I. Ion energies 3 to 40 keV - II. Ion energies 100 to 4000 eV

1955 ◽  
Vol 227 (1171) ◽  
pp. 466-486 ◽  
Keyword(s):  
Charge Transfer ◽  
Energy Range ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Hydrogen Ions ◽  
Electron Detachment ◽  
Rare Gases ◽  
Helium Ions ◽  
Ion Energies

This paper describes the measurement of charge transfer cross-sections for protons, molecular hydrogen ions and helium ions in the rare gases and hydrogen, and electron detachment cross-sections for negative atomic hydrogen ions in the rare gases. Part I describes the energy range 3 to 40 keV. In part II the energy range 100 to 4000 eV is described, and the results are discussed in terms of the pseudo-adiabatic hypothesis. Comparisons are made with other experimental results, and anomalous molecular cases are discussed in terms of reactions involving anti-bonding states.

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