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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/34177
Title: | 鈹原子光游離過程的研究 Studies on Photoionization Processes of the Beryllium Atom |
Authors: | Ju-Tang Hsiao 蕭儒棠 |
Advisor: | 黃克寧 |
Keyword: | 光游離,鈹,多組態,相對論, Photoionization,Beryllium,Configuration,Relativistic, |
Publication Year : | 2006 |
Degree: | 博士 |
Abstract: | 本論文以「多組態相對混相理論(MCRRPA)」探討鈹原子的光游離過程。我們計算介於第一和第二游離閾之間的光游離截面,以及光電子角分佈與極化參數。在此光子能量範圍裡,光電子譜呈現「五個瑞德伯系列」的自離共振結構。我們詳細探討這些共振附近角分佈和極化參數的變化,以及其與共振位置與寬度的關係,並且提供將來實驗探討的面向。 Photoionization parameters in neutral beryllium are calculated in the multiconfiguration relativistic random-phase approximation to resolve the interplay between relativistic and correlation effects in low-Z atoms or ions. Precise energies and widths of five Rydberg series of low-lying doubly-excited states are given. Experimental studies on angular distribution of photoelectrons are suggested to obtain information on widths of some states, which cannot be obtained from total cross section measurements. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/34177 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 物理學系 |
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ntu-95-1.pdf Restricted Access | 2.35 MB | Adobe PDF |
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