Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions

doi:10.1088/1674-1056/23/2/023101

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 23101-023101.doi: 10.1088/1674-1056/23/2/023101

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions

Ismail Abdalla Saber^{a b}, 董晨钟^{a b}, 王向丽^{a b}, 周卫东^{a b}, 武中文^{a b}

a Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
b Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of ModernPhysics of the Chinese Academy of Sciences, Lanzhou 730070, China

收稿日期:2013-04-28 修回日期:2013-07-23 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91126007, 11274254, 10964010, and 11064012).

Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions

Ismail Abdalla Saber^{a b}, Dong Chen-Zhong (董晨钟)^{a b}, Wang Xiang-Li (王向丽)^{a b}, Zhou Wei-Dong (周卫东)^{a b}, Wu Zhong-Wen (武中文)^{a b}

a Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
b Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of ModernPhysics of the Chinese Academy of Sciences, Lanzhou 730070, China

Received:2013-04-28 Revised:2013-07-23 Online:2013-12-12 Published:2013-12-12
Contact: Dong Chen-Zhong E-mail:dongcz@nwnu.edu.cn
About author:31.15.A-; 31.30.jp; 31.30.jr; 32.80.Aa
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91126007, 11274254, 10964010, and 11064012).

摘要/Abstract

摘要： The transition energies and electric dipole (E1) transition rates of the K, L, and M lines in neutral Np have been theoretically determined from the MultiConfiguration Dirac–Fock (MCDF) method. In the calculations, the contributions from Breit interaction and quantum electrodynamics (QED) effects (vacuum polarization and self-energy), as well as nuclear finite mass and volume effects, are taken into account. The calculated transition energies and rates are found to be in good agreement with other experimental and theoretical results. The accuracy of the results is estimated and discussed. Furthermore, we calculated the transition energies of the same lines radiating from the decaying transitions of the K-, L-, and M-shell hole states of Np ions with the charge states Np¹⁺ to Np⁶⁺ for the first time. We found that for a specific line, the corresponding transition energies relating to all the Np ions are almost the same; it means the outermost electrons have a very small influence on the inner-shell transition processes.

关键词: Np ions, K, L, and M X-rays, transition energies, transition rates

Abstract: The transition energies and electric dipole (E1) transition rates of the K, L, and M lines in neutral Np have been theoretically determined from the MultiConfiguration Dirac–Fock (MCDF) method. In the calculations, the contributions from Breit interaction and quantum electrodynamics (QED) effects (vacuum polarization and self-energy), as well as nuclear finite mass and volume effects, are taken into account. The calculated transition energies and rates are found to be in good agreement with other experimental and theoretical results. The accuracy of the results is estimated and discussed. Furthermore, we calculated the transition energies of the same lines radiating from the decaying transitions of the K-, L-, and M-shell hole states of Np ions with the charge states Np¹⁺ to Np⁶⁺ for the first time. We found that for a specific line, the corresponding transition energies relating to all the Np ions are almost the same; it means the outermost electrons have a very small influence on the inner-shell transition processes.

Key words: Np ions, K,L, and M X-rays, transition energies, transition rates

中图分类号: (Ab initio calculations)

31.15.A-

31.30.jp (Electron electric dipole moment) 31.30.jr (QED corrections (Lamb shift) in muonic hydrogen and deuterium) 32.80.Aa (Inner-shell excitation and ionization)

Ismail Abdalla Saber, 董晨钟, 王向丽, 周卫东, 武中文. Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions[J]. 中国物理B, 2014, 23(2): 23101-023101.

Ismail Abdalla Saber, Dong Chen-Zhong (董晨钟), Wang Xiang-Li (王向丽), Zhou Wei-Dong (周卫东), Wu Zhong-Wen (武中文). Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions[J]. Chin. Phys. B, 2014, 23(2): 23101-023101.

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Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions

Theoretical study on K, L, and M X-ray transition energies and rates of neptunium and its ions

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