Calculations of atomic structure

We are dealing with the atomic structure and dynamics calculations, mainly concentrating on the study of photon, electron and ion impact on noble gases in energy and time domain trying to interpret the coincidence or single particle data. An exception to that are the calculations of Mg and Si satellite structure.

As a basis for the matrix elements calculation we most often employ the relativistic multi-configurational Dirac-Fock approach (GRASP) but we are developing also the other approaches, like complex rotation method which is used to deal with atoms in the nonzero field environment. We tend to set-up the calculation machinery to deal with the simple molecules.

Below we quote some representative publications from 1996 where our expertise in calculations was a main or at least very important input:

Radiative Auger Effect

  • A. Muhleisen et al, Phys. rev., A, 1996, vol. 54, str. 3852-3858. "K-LM and K-MM radiative Auger effect from Kr and Xe."

Calculation of satellite spectra measured in the ion impact

  • M. Kobal et al, Phys. rev., A, 2004, vol. 70, str. 062720-1-062720-11. "Double-K-shell ionizaton of Mg and Si induced in collisions with C and Ne ions."
  • R. O. Barrachina and M. Žitnik, J. phys., B At. mol. opt. phys. 2004, vol. 37, str. 3847-3857. "Young's interference effect in the autoionization of atoms colliding with molecules."

Nondipolar effect in the electron impact excitation

  • C. Schroter et al., J. phys., B At. mol. opt. phys., 1999, vol. 32, str. 171-188. "Angle-resolved electron energy loss study on the inner-shell excited states of Ne."

Fluorescence decay channel of strongly autoionizing states in neon and helium, lifetimes of singly and doubly excited states, spin-orbit interaction, characterization of fluorescence cascade decays and previously unobserved series of doubly excited states, angular distribution of fluorescence

  • P. Lablanquie et al., Phys. rev. lett., 2000, vol. 84, str. 431-434. "Observation and characterization of the fluorescence decay of the 2s2p[sup]6np[sup]1P[sup][compositum] excited state of Ne."
  • F. Penent et al, Phys. rev. lett., 2001, vol. 86, str. 2758-2761. "Observation of triplet doubly excited states in single photon excitation from ground state helium."
  • M. Žitnik et al., Phys. rev., A, 2002, vol. 65, str. 032520-1-032520-12. "Fluorescence of low-lying doubly photoexcited states in helium."
  • J. Lambourne et al., Phys. rev. lett., 2003, vol. 90, 153004/1-4. "Experimental determination of the lifetime for the 2p3d([sup]1P[sup]0) helium doubly excited state."
  • M. Coreno et al., Phys. rev., A, 2005, vol. 72, str. 052512-1-052512-8. "Branhcing ratios in the radiative decay of helium doubly excited states."

Photoexcitation and decay of helium doubly excited states in weak and strong DC electric field.

  • M. Žitnik and A. Mihelič, J. phys., B At. mol. opt. phys., 2006, vol. 39, str. L167-L174. "Weak stark mixing of doubly excited states in helium below N = 2."
  • Prince et al., Phys. rev. lett., 2006, vol. 96, str. 093001-1-093001-4. "Detection of the [sup]1P[sup]e series of doubly excited helium states below N =2 via stark effect."
  • M. Žitnik et al., . Phys. rev., A, 2006, vol. 74, 051404R. "Effect of electric fields on the decay branching ratio of 1Pe doubly excited states in helium."
  • A. Mihelič and M. Žitnik, Phys. rev. lett., 2007, vol. 98, no. 7, str. 243002-1-243002-4. "Ab initio calculation of photoionization and inelastic photon scattering spectra of He below the N = 2 threshold in a dc electric field."

Resonant Raman Auger decay

  • R. Camilloni et al., Phys. rev. lett., 1996, vol. 77, str. 2646-2649. "Interference effects in the Auger Decay of the resonantly excited 2p3/2 3d state of argon."
  • P. Lablanquie et al., Phys. rev. lett., 2000, vol. 84, str. 47-50. Coster-Kronig decay of the Ar 2s hole observed by Auger-threshold photoelectron coincidence spectroscopy."

Resonant inelastic x-ray scattering

  • M. Žitnik et al., Phys. rev., A, 2007, vol. 76, no. 3, str. 032506-1-032506-10. "Inelastic x-ray scattering in the vicinity of xenon L[sub]3 edge."

Parametrization of photo-double ionization of argon

  • P. Bolognesi et al., J. phys., B At. mol. opt. phys., 2004, vol. 37, str. 2285-2302 "Photo-double ionization of argon at 20 and 40 eV excess energy."

Contact person:

Dr. Matjaž Žitnik

Last updated: 01/22/2014