A numerical Hartree self-consistent field calculation of an autoionization resonance parameters for a doubly excited 2s2, 3s2, and 4s2 states of He atom with a complex absorbing potential

• 来源期刊: 中国物理B（英文版）
• 关键词: self-consistent field Hartree-Fock equation helium autoionization pseudospectral method
• 年，卷（期）: 2017,（8）
• 页码范围: 114-122
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/8/083101

摘要

The self-consistent Hartree-Fock equation for the He atom is solved using the pseudospectral method.The Feshbachtype autoionization resonance parameters for doubly excited 2s2,3s2,and 4s2 1S states of He have been determined by adding a complex absorbing potential to the Hamiltonian.The Riss-Meyer iterative and Padé extrapolation methods are applied to obtain reliable values for the autoionization resonance parameters,which are compared to previous results in the literature.