本論文使用「多組態相對論混相理論(MCRRPA)」計算雙價電子原子的光離過程中光電子的角分布與自旋極化相關特徵與性質。我們同時回顧以前的研究成果,系統性地通盤分析雙激發共振的所有光離性質。我們精確地計算雙激發共振「五個里德伯系列」的光離參數(σ,β,ξ,η,ς),並分析它們在共振位置附近的行為。由於近年光離實驗上的設備與技術的大幅進步大大提高了光離截面量測的解析度,較高能量區域的自離共振結構密集且複雜,我們發展出「通道分析法」用以分析高能區的雙激發共振。另一方面,我們也嘗試利用分析各系列里德伯共振的量子虧損來分析共振的類型與確認其命名。
Angular distribution and spin polarization of photoelectrons from two-electron and divalent atoms are investigated by using the multiconfiguration relativistic random-phase approximation. Our previous studies are reviewed and further investigations are developed. Photoionization parameters for all five Rydberg series of doubly-excitation resonances were presented and we developed "channel-analysis method" to clarify the high-energy portion of the Rydberg series, in which peaks corresponding to double excitations can be identified unambiguously. Meanwhile, quantum defects of Rydberg series could be verified independently.