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Electron– and positron–molecule scattering: development of the molecular convergent close-coupling method

Journal Article · · Journal of Physics. B, Atomic, Molecular and Optical Physics
Starting from first principles, this tutorial describes the development of the adiabatic-nuclei convergent close-coupling (CCC) method and its application to electron and (single-centre) positron scattering from diatomic molecules. In this paper, we give full details of the single-centre expansion CCC method, namely the formulation of the molecular target structure; solving the momentum-space coupled-channel Lippmann-Schwinger equation; deriving adiabatic-nuclei cross sections and calculating $$V$$-matrix elements. Selected results are presented for electron and positron scattering from molecular hydrogen H$$_2$$ and electron scattering from the vibrationally excited molecular hydrogen ion H$$_2^+$$ and its isotopologues (D$$_2^+$$, T$$_2^+$$, HD$^+$, HT$^+$ and TD$^+$). Finally, convergence in both the close-coupling (target state) and projectile partial-wave expansions of fixed-nuclei electron- and positron-molecule scattering calculations is demonstrated over a broad energy-range and discussed in detail. In general the CCC results are in good agreement with experiments.
Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
Air Force Office of Scientific Research (AFOSR) (United States); Curtin Univ. (Australia); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1356147
Alternate ID(s):
OSTI ID: 22865330
Report Number(s):
LA-UR-17-20546
Journal Information:
Journal of Physics. B, Atomic, Molecular and Optical Physics, Journal Name: Journal of Physics. B, Atomic, Molecular and Optical Physics Journal Issue: 12 Vol. 50; ISSN 0953-4075
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Convergent close-coupling approach to light and heavy projectile scattering on atomic and molecular hydrogen journal October 2017
Vibrationally resolved electron-impact excitation cross sections for singlet states of molecular hydrogen journal June 2018
Roadmap on photonic, electronic and atomic collision physics: II. Electron and antimatter interactions journal August 2019
Calculations of positron scattering on the hydrogen molecular ion journal January 2019
Vibrational excitation of the ${{\rm{H}}}_{2}X{}^{1}{{\rm{\Sigma }}}_{g}^{+}$ state via electron-impact excitation and radiative cascade journal February 2019
Electron mass stopping power in H 2 journal August 2017
Electron-impact dissociative excitation cross sections for singlet states of molecular hydrogen journal September 2018
Low-energy electron scattering from molecular hydrogen: Excitation of the X 1 Σ g + to b 3 Σ u + transition journal December 2018
Electron-impact dissociation of molecular hydrogen into neutral fragments journal February 2018
Electron-Impact Dissociation of Vibrationally-Excited Molecular Hydrogen into Neutral Fragments journal August 2019

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