Theoretical Study Of Electron Impact Single Ionization Of Neon By Multicenter Three Distorted-Wave Method At Low Projectile Energy: An Overall Agreement With Experiment

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS(2021)

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摘要
Universal theoretical description of electron impact single ionization process for complex atoms and molecules is a long-standing challenge. A perturbative approach named multicenter three distorted wave method (MCTDW) has recently been developed by our group, aiming at calculating (e, 2e) fully differential cross sections for molecular target. In MCTDW method, the incident, scattered and ejected electrons are described by distorted waves using single center expansion technique. The continuum wave functions of the incident and two outgoing electrons are solved in the potential of neutral molecule and ion, respectively. The accuracy and generality of this method has been demonstrated for water molecule as well as simple two-electron atom helium (2018 Phys. Rev. A 98 042710) . Here MCTDW is extended to investigate more complex multi-electron atom neon of electron impact ionization from its 2p orbital at projectile energy of 100 eV and 65 eV. The results are compared with the internormalized experiments reported in the literatures (2013 Phys. Rev. Lett. 110 153202; 2015 Phys. Rev. A. 91 032707). An overall agreement has been achieved with experimental data for different scattering angles and energies, as well as theoretical calculations employing nonperturbative B-spline R-matrix with pseudostates approach.
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关键词
electron impact single ionization, neon, MCTDW, low impact energy, fully differential cross sections
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