Open AccessElectron-Impact Excitation of 51S – 51Po Resonance Transition in Sr Atom
Author(s) -
Elizabeth Nagy,
Viktor Gedeon,
С. В. Гедеон,
V. Yu. Lazur
Publication year - 2018
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe63.01.0011
Subject(s) - atomic physics , atomic orbital , resonance (particle physics) , physics , excitation , scattering , atom (system on chip) , wave function , electron , shape resonance , ground state , strontium , quantum mechanics , computer science , embedded system , nuclear physics
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 5s5f 1Fo 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.