Relativistic and correlation effects in heavy atoms, including relativistic
Hartree Fock calculations, relativistic many-body perturbation theory (MBPT)
calculations, and iterative singles-doubles (SD) all-order methods.
Present efforts:
Nonlinear terms in SD coupled cluster equations.
Third-Order MBPT for systems with two valence electrons.
Extending
the SD method to Two valence electron systems.
Applications of MBPT to give accurate energies, transition rates, and hyperfine
constants for low-lying levels of ions in various isoelectronic sequences.
These studies include the Li, Na, Cu, Ne, Be,
B, Mg, Pd, and Ag sequences.
Applications of all-order SD methods to alkali-metal atoms
from Li to Fr.
Weak interactions in heavy atoms atoms. Calculations of PNC amplitudes
and electric dipole enhancement factors.
CI calculations of energies, transition probabilities, hyperfine quenching,
polarizabilities, and two-photon transitions in heliumlike ions.
Applications of the relativistic random-phase approximation (RRPA) to photoionization,
including non-dipole corrections to angular distributions.
Plasma Physics: Average atom model and the Kubo-Greenwood
theory applied to study the optical response in a warm dense plasma.
The following material is based upon work supported in part by the National
Science Foundation under Grant No. 01-39928, and in part by Lawrence Livermore
National Laboratory under Contract No. B516165. Additional
support from the Alexander von Humboldt Foundation and from a Gordon Godfrey
fellowship is also gratefully acknowledged.
Accurate Relativistic Calculations Including QED Contributions
for Few-Electron Systems W. R. Johnson, K. T. Cheng, and M. H. Chen,
in Relativistic Electronic Structure Theory: Part 2.
Applications (Theoretical and Computational Chemistry # 14) Ed.
Peter Schwerdtfeger, Chap. 3, ISBN 0444512993 (Elsevier, 2004).
pdf-preprint (531K)
Finite-field evaluation of the Lennard-Jones atom-wall interaction
constant C3 for alkali-metal atoms
W. R. Johnson, V. A. Dzuba, U. I. Safronova, and M. S. Safronova,
Phys. Rev. A 69, 022508, 1-6 (2004) .
arXiv:physics/0310141
Relaxation effect and radiative corrections in many-electron atoms
Andrei Derevianko, Boris Ravaine, and W. R. Johnson,
Phys. Rev. A 69, 054502, 1-4 (2004).
arXiv:physics/0401043
Nondipole effects in the photoionization of Xe 4d5/2 and
4d3/2: Evidence for quadrupole satellites,
O. Hemmers, R. Guillemin, D. Rolles, A. Wolska, D. W. Lindle,
K. T. Cheng, W. R. Johnson, H. L. Zhou and S. T. Manson,
Phys. Rev. Letts. 93, 113001, 1-4 (2004).
pdf reprint
Excitation energies, oscillator strengths, and lifetimes of levels along the
gold isoelectronic sequence.
U. I. Safronova and W. R. Johnson,
Phys. Rev. A 69, 052511, 1-9 (2004).
arXiv:physics/0402133
Off-diagonal hyperfine interaction between the 6p1/2 and
6p3/2
levels in 133Cs.
W. R. Johnson, H. C. Ho, Carol E. Tanner and Andrei Derevianko,
Phys. Rev. A 70, 014501, 1-3 (2004).
arXiv:physics/0404102
Nondipole effects in Xe 4d photoemission,
O. Hemmers, R. Guillemin, A. Wolska, D. W. Lindle, D. Rolles,
K. T. Cheng, W. R. Johnson, H. L. Zhou and S. T. Manson,
Submitted to Journal of Electron Spectroscopy and Related Phenomena, July (2004).
pdf preprint 133K
Excitation energies, hyperfine constants, E1, E2, M1 transition
rates, and lifetimes of 6s2nl states in Tl I and Pb II.
U. I. Safronova, M. S. Safronova, and W. R. Johnson,
submitted to Phys. Rev. A, Oct. 12 (2004).
arXiv:physics/0410079
Optical Properties of Plasmas Based on an Average-Atom Model,
W. R. Johnson, C. Guet, and G. F. Bertsch,
submitted to Journal of Quantitative Spectroscopy & Radiative Transfer,
Nov. (2004).
PDF
- 390K
Analysing the dramatic impact of the bound electron contribution
to the index of refraction in plasmas,
Joseph Nilsen and W. R. Johnson,
submitted to Phys. Rev. E, Nov. (2004).
PDF
- 520K
Impact of anomalous dispersion on the interferometer measurements
of plasmas.
J. Nilsen, W. R. Johnson, C. A. Iglesias, and J. Scofield,
submitted to Journal of Quantitative Spectroscopy & Radiative Transfer,
Dec. 14 (2004).
PDF
- 635K
Relativistic many-body calculations of excitation energies, line strengths,
transition rates, and oscillator strengths in Pd-like ions.
U. I. Safronova, T. E. Cowan, and W. R. Johnson,
submitted to Canadian Journal of Physics,
Mar. 4 (2005).
PDF
- 252K
Other (Unpublished) Atomic Physics Material
Lecture Notes on Atomic Physics, W. R. Johnson (unpublished,1994).
PDF
- 1238K
Non-dipole angular distribution parameters for rare gas atoms (graphs),
W. R. Johnson (1999).
PDF
- 204K
Non-dipole angular distribution parameters for rare gas atoms (tables),
W. R. Johnson (1999).
TableI.txt
TableII.txt
Ulyana I. Safronova,
Adjunct Professor of Physics (Professor of Physics, Academy of Sciences,
Russia), present address: Dept. of Physics, University of Nevada (Reno).
Marianna S. Safronova, Research Collaborator, Asst. Professor of Physics,
Uiversity of Deleware
Igor M. Savukov,
Research Collaborator, Postdoctoral Associate Princeton University
Andrei Derevianko,
Research Collaborator, Asst. Professor of Physics (University of Nevada Reno)
Vladimir
Dzuba, Visiting Professor (University of New South Wales, Sydney, Australia)
June-July 1998, Aug-Sept 2000, May-June 2002, June-july 2004
Mikhail G. Kozlov, Visiting Professor
(Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia) Feb 15
- Apr 15 2001 and Oct 2003
Leonti Labzowski, Visiting Professor
(St. Petersburg State University, St. Petersburg, Russia) Mar 2 -
- Apr 30 2002