《高離化態類K離子精細結構的理論研究》是一篇理論物理專業的博士論文，作者是楊力，指導教師李家明研究員。
基本介紹
- 中文名： 高離化態類K離子精細結構的理論研究
- 作者：楊力
- 導師：李家明
- 學科專業：理論物理
論文信息,中文摘要,外文摘要,
論文信息
副題名
外文題名
學位級別
d 1989n
學位授予單位
學位授予時間
1989
關鍵字
K離子
館藏號
O562
唯一標識符
108.ndlc.2.1100009031010001/T3F24.012002608576
館藏目錄
1999\O562\5
中文摘要
高離化態原子是熱星體、受控核聚變電漿以及雷射電漿的主要組成部分，開展高離化態離子的能級結構的研究，有利於了解它們的物質結構和內部過程。而相應的理論研究對於分析理解實驗結果，把握重要的物理內涵具有重要意義。因而成為是當前原子物理學發展的前沿領域之一。高離化態原子以核庫侖場為主，能級結構具有“〓”準簡併的趨勢。因此在第一電離極限下出現許多實激發態，使它們的能級結構變得複雜化。另一方面，使得主量子數n相同的實激發態與價激發態的能級發生交叉。在此交叉區域，宇稱及角動量相同的能態之間將發生強烈的組態混合作用。本文在組內原有的基礎上擴展了相對論性的組態相互作用程式。對K等電子序列的離子進行了研究。著重分析了實激發組態〓與nf（n=4，5，6）組態之間的相互作用情況。發現在Z=36附近，由於〓組態對〓能級之間相互作用的不平衡導致了〓光譜項精細結構的翻轉。計算得到的精細結構、激發能、及譜線強度比與實驗結果符合的很好。文中所採用的量子數虧損曲線方法對於選擇重要的干擾組態具有明確的指導意義。
外文摘要
THEORETICAL INVESTIGATION OF FINE STRUCTUREFOR HIGHLY IONIZED K-LIKE ATOMIC IONSYang LiInstitute of Physics,Academia Sinica
ABSTRACT
Highly ionized atomic ions are the major parts ofcomposition in hot stars,magnetically or inertiallyconfined high temperature fusion plasmas,and laser-produced plasmas.Experimental studies in this fieldgives us much information about the plasmas;and theo-retical investigation makes one a deeper understangingof the important effects and phenomena.Both of thembelong to the most rapidly developping aeras of con-temporary atomic physics.Since the nuclear charge Zgreatly exceeds the charge of remaining electrons,theelectronic interaction is predominantly central.Thisleads to the degeneration of the structure for orbitalangular momentum 〓 i.e.the 〓 quasi-degeneration.As the result of 〓 quasi-degeneration,many core-excited levels appear which make the structure of highlyionized ions more complex than neutral atoms or fewionized atomic ions.The crossing between the core-excited levels and valence-excited ones with same symme-try and angular momentum,will strongly mix each other.So the theoretical methods including accurate treatmentof electron-electron effects are needed.Our work list asfollow.Firstly,we have modified the code of reltiviticconfiguration interaction(RCI)developped by Zhong-XingZhao and Jia-Ming Li(Zhong-Xing Zhao and Jia-Ming Li,ActaPhysica Sinica,1985).Then we have analysized,using thiscode,the fine structure of atomic ions along the K iso-electronic sequence.Particularly,interaction between〓 3dns and nf channel is analysized in detail.We havefound that the unequal mixing,for J=5/2 and J=7/2,between〓 3d4s and 4f configurations give rise to the reversedfine structure splitting of 〓 term,for atomic ionswith Z=36;while 〓 and 〓 have normal finestructure splittings.The theoretical values of fine struc-ture,excited energy,and intensity ratio of spectra agreewell with recent spectroscopic measurent.A method toexamine systematically configuration mixing along iso-electronic sequence are presented.
