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  • 學位論文

鎂原子光游離過程的研究

Studies on Photoionization Processes of the Magnesium Atom

指導教授 : 黃克寧

摘要


「多組態相對論混相理論(MCRRPA)」已被應用在許多具有多組態本質的各種原子系統上,且大部分的情況下都能得到與實驗數據相當一致的結果。本論文針對中性鎂原子探討其光游離過程,計算入射光子能量大於第一游離閾而小於第二游離閾時的光游離截面積,以及光電子角分佈參數和自旋極化參數等物理量。在此能量範圍裡,光電子譜呈現「五個萊德堡系列」的自離共振結構。我們詳細探討在這些激發共振態附近角分佈參數和自旋極化參數的變化,以及其與共振態的位置與寬度的關係;此外,並計算與討論「核遮蔽效應」對這些物理量造成的影響。

並列摘要


The multiconfiguration relativistic random-phase approximation(MCRRPA) is applied to the photoionization of magnesium atom. The influence of relativistic and correlation effects on the cross section, angular distribution, and spin polarization parameters of photoelectrons is studied in detail. In the photon-energy region between the first and second ionization thresholds of autoionization due to the doubly-excited states, there are five Rydberg series coupling strongly to each other. The relation of the variations of the angular distribution, and spin polarization parameters in the vicinity of each resonance to the positions and widths of these doubly-excited states are studied.

並列關鍵字

Photoionization MCRRPA Mg

參考文獻


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