Quick search Find article
Quick search
Find article

Electron-impact excitation of neon: a pseudo-state convergence study

C P Ballance and D C Griffin

Show affiliations


A number of convergent close-coupling and R-matrix with pseudo-state (RMPS) calculations for H-like, He-like, Li-like and Be-like ions have demonstrated that coupling to the target continuum can have large effects on the electron-impact excitation cross sections of neutral and low-charge species. However, no one has yet attempted such advanced calculations on a system as complex as neutral neon. We report on a series of RMPS calculations of electron-impact excitation of Ne using recently developed parallel Breit–Pauli R-matrix programs. Our largest calculation included 235 spectroscopic and pseudo-state levels in the close-coupling expansion of the target. Although the results clearly reveal the importance of coupling to the target continuum in this atom, the pseudo-state expansion is not yet sufficiently complete to provide reliable cross sections for energies above the ionization limit. However, this is the largest intermediate-coupling calculation that can be performed with present computer resources. Thus, we have also carried out a series of RMPS calculations in LS coupling with different pseudo-state expansions. Comparisons of these results have allowed us to determine the approximate size of the pseudo-state expansion required to achieve convergence in future intermediate-coupling calculations for neon.


PACS

34.80.Dp Atomic excitation and ionization

31.15.bt Statistical model calculations (including Thomas–Fermi and Thomas–Fermi–Dirac models)

Subjects

Atomic and molecular physics

Computational physics

Dates

Issue 14 (28 July 2004)

Received 30 April 2004

Published 8 July 2004



  1. Electron-impact excitation of neon: a pseudo-state convergence study

    C P Ballance and D C Griffin 2004 J. Phys. B: At. Mol. Opt. Phys. 37 2943

  2. Electronic structure, magnetic properties and electrical resistivity of the Fe2V1−xTixAl Heusler alloys: experiment and calculation

    A Ślebarski et al 2006 J. Phys.: Condens. Matter 18 10319

  3. Application of the MAX/EGS4 exposure model to the dosimetry of the Yanango radiation accident

    R Kramer et al 2005 Phys. Med. Biol. 50 3681

  4. The Distribution of Absorbing Column Densities among Seyfert 2 Galaxies

    G. Risaliti et al. 1999 ApJ 522 157

  5. Symmetry-seeking spacetime coordinates

    David Garfinkle and Carsten Gundlach 1999 Class. Quantum Grav. 16 4111

  6. Low-lying excitations in the square - triangle random tiling model

    P A Kalugin 1997 J. Phys. A: Math. Gen. 30 7077

  7. Optical measurements on laser-produced plasmas

    P E Faugeras et al 1968 Plasma Phys. 10 939

  8. Geometry of high-lying eigenfunctions in a plane billiard system having mixed-type classical dynamics

    Baowen Li and M Robnik 1995 J. Phys. A: Math. Gen. 28 2799

  9. Stability of silver cluster in zeolite A and Y catalysts

    Takashi Yamamoto et al 2009 J. Phys.: Conf. Ser. 190 012171

  10. Theory of the formation cross section of a meso-molecule inside a normal molecule

    A M Lane 1987 J. Phys. B: At. Mol. Phys. 20 2911

Related review articles

What's this?
View review articles related to this research to gain an insight into the key trends in this subject area. Related review articles are selected based on PACS/MSC codes, and are no more than three years old.

  1. Strong-field rescattering physics—self-imaging of a molecule by its own electrons
  2. Electron-impact cross sections for deuterated hydrogen and deuterium molecules
  3. Modeling of gas discharge plasma

View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.