Probing the nonlocal approximation to resonant collisions ofelectrons with diatomic molecules

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A numerically solvable two-dimensional model introduced bythe authors [Phys. Rev. A 73, 032721 (2006)]is used to investigate thevalidity of the nonlocal approximation to the dynamics of resonantcollisions of electrons with diatomic molecules. The nonlocalapproximation to this model is derived in detail, all underlyingassumptions are specified and explicit expressions for the resonant andnon-resonant (background) T matrix for the studied processes are given.Different choices of the so-called discrete state, which fully determinesthe nonlocal approximation, are discussedand it is shown that a physicalchoice of this state can in general give poorer results than otherchoices that minimize the non-adiabatic effects and/or the backgroundterms of ... continued below

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Houfek, Karel; Rescigno, Thomas N. & McCurdy, C. William September 7, 2007.

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A numerically solvable two-dimensional model introduced bythe authors [Phys. Rev. A 73, 032721 (2006)]is used to investigate thevalidity of the nonlocal approximation to the dynamics of resonantcollisions of electrons with diatomic molecules. The nonlocalapproximation to this model is derived in detail, all underlyingassumptions are specified and explicit expressions for the resonant andnon-resonant (background) T matrix for the studied processes are given.Different choices of the so-called discrete state, which fully determinesthe nonlocal approximation, are discussedand it is shown that a physicalchoice of this state can in general give poorer results than otherchoices that minimize the non-adiabatic effects and/or the backgroundterms of the T matrix. The background contributions to the crosssections, which are usually not considered in the resonant theory ofelectron-molecule collisions, can be significant not only for elasticscattering but also for the inelastic process of vibrationalexcitation.

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  • Journal Name: Physical Review A; Journal Volume: 77; Related Information: Journal Publication Date: 2008

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  • Report No.: LBNL--63489
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 929053
  • Archival Resource Key: ark:/67531/metadc902556

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  • September 7, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 3:55 p.m.

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Houfek, Karel; Rescigno, Thomas N. & McCurdy, C. William. Probing the nonlocal approximation to resonant collisions ofelectrons with diatomic molecules, article, September 7, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc902556/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.