Elastic and related transport cross sections for
H+ + H2(n) and
H + H2+(n)
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Introduction
Important notes and updates
Publications
Data tables
The data tables and interactive graphs made available here contain theoretical integral elastic cross sections for scattering of proton/hydrogen on vibrationally excitated states of the diatomic molecular target (hydrogen molecule/molecular ion). The data have been calculated for center-of-mass energies within the range 0.6-9.5 eV, utilizing a fully quantum-mechanical approach, within sudden approximation for rotations (appropriate averaging was done over molecular orientations).
Following the general procedures outlined in our previous
papers which provided theoretical differential,
integral elastic and related transport (momentum transfer and
viscosity) cross sections for collisions among various
combinations of ions and atoms/molecules, we also tabulate the
momentum transfer and viscosity cross sections.
In brief, the calculations were performed by solving the radial
Schrodinger equation for each partial wave component on the two
lowest electronic adiabatic surfaces of H3+.
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- 1. The data have been posted as of 3/17/03. Any updates will be
documented here.
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- 1. "Elastic processes involving vibrationally excited molecules in cold hydrogen plasmas," P.S. Krstic and D.R. Schultz, J. Phys. B 36, 385 (2003).
- 2. "Elastic and related transport cross sections for collisions among isotopomers of H+ + H, H+ + H2, H+ + He, H + H, and H + H2," P.S. Krstic and D.R. Schultz, Atomic and Plasma-Material Data for Fusion 8, 1 (1998). (Postscript file containing the introduction, basic theoretical description, comparison with existing results, scaling relations, description of tables and graphs, and references - approximately 70 pages, 1.68 Mb; approximately 650 pages of graphs and tables omitted).
- 3. "Elastic scattering and charge transfer in slow collisions: Isotopes of H and H+ colliding with isotopes of H and with He," P.S. Krstic and D.R. Schultz, J. Phys. B 32, 3485 (1999). (Postscript (5.48 Mb)).
- 4. "Consistent definitions for, and relationships among, cross sections for elastic scattering of hydrogen ions, atoms, and molecules," P.S. Krstic and D.R. Schultz, Phys. Rev. A 60, 2118 (1999). (Postscript (4.21 Mb)).
- 5. "Elastic and vibrationally inelastic slow collisions: H + H2, H+ + H2," P.S. Krstic and D.R. Schultz, J. Phys. B 32, 2415 (1999). (Postscript (3.53 Mb))
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Integral Cross Sections
The statistically averaged (see explanation above) elastic integral
cross section, momentum transfer cross section, and viscosity cross
section are given in the following table as a function of center of
mass collision energy . The cross sections are
given in atomic units (i.e. 1 a.u. of cross section =
[Bohr radius]2 = 2.80028 * 10-17 cm2).
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