Electron-Impact Excitation of 51S – 51Po Resonance Transition in Sr Atom

  • E. A. Nagy Uzhgorod National University (54, Voloshyna Str., Uzhgorod 88000, Ukraine)
  • V. F. Gedeon Uzhgorod National University (54, Voloshyna Str., Uzhgorod 88000, Ukraine)
  • S. V. Gedeon Uzhgorod National University (54, Voloshyna Str., Uzhgorod 88000, Ukraine)
  • V. Yu. Lazur Uzhgorod National University (54, Voloshyna Str., Uzhgorod 88000, Ukraine)

Abstract

Main aspects of a new version of the B-spline R-matrix (BSR) method, in which nonorthogonal orbitals are applied, have been described. The BSR approximation is used to calculate the resonance structure of integral cross-sections of the 51S - 51Po transition at the electron scattering by a strontium atom in the energy interval up to 10 eV. The multiconfiguration Hartree–Fock method with a nonorthogonal set of orbitals is employed to accurately represent the target wave functions. The close-coupling expansion included 31 bound states of a neutral strontium atom ranging from the ground state to the 5s51Fo one. The calculated cross-sections are in good agreement with available experimental data and can be exhaustively interpreted. The structure of a resonance feature in the e-Sr scattering cross-sections at about 4 eV is discussed.

Keywords strontium atom, electron-atom collisions, resonance transition, scattering cross-sections, resonances

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Published
2018-02-01
How to Cite
Nagy, E., Gedeon, V., Gedeon, S., & Lazur, V. (2018). Electron-Impact Excitation of 51S – 51Po Resonance Transition in Sr Atom. Ukrainian Journal Of Physics, 63(1), 11-24. doi:10.15407/ujpe63.01.0011
Section
Optics, atoms and molecules