Charge Transfer Cross-Sections for Nitrogen(v) and Sulfur(iii) Ions Interacting With Hydrogen Atoms in Astrophysical Plasmas
Feickert, Carl Arthur
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/77350
Description
Title
Charge Transfer Cross-Sections for Nitrogen(v) and Sulfur(iii) Ions Interacting With Hydrogen Atoms in Astrophysical Plasmas
Author(s)
Feickert, Carl Arthur
Issue Date
1983
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Astronomy and Astrophysics
Language
eng
Abstract
In the past decade, the important role of charge exchange in astrophysical plasmas has become firmly established following the initial work of Williams (1973), Steigman (1975) and others. However for multiply charged ions of astrophysical importance, reliable experimental values for the reactive cross sections involving neutral hydrogen and helium are not generally available. In the absence of such values, one must rely on theoretical calculations of the relevant reaction rates.
In this thesis, standard scattering theory formalisms are set forth, by which reactive cross sections may be deduced, given the required molecular potentials. In addition, two bases for the representation of the molecular wavefunctions are described along with a simple, semiclassical, analytic approximation to the reactive cross section. This development is continued by rendering these analytic formalisms, for the S('+2)-H and N('+4)-H systems, into quantitative reactive cross sections through the numerical solution of the scattering equations in an appropriate basis. Simple interpretations of the qualitative features of these calculations are then possible and their astrophysical relevance reviewed, with particular attention to the limitations of semiclassical methods utilized by previous investigators of these systems.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
