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Chin. Phys. B, 2014, Vol. 23(2): 023101    DOI: 10.1088/1674-1056/23/2/023101

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

Ismail Abdalla Sabera 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
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.
Keywords:  Np ions      K,L, and M X-rays      transition energies      transition rates  
Received:  28 April 2013      Revised:  23 July 2013      Accepted manuscript online: 
PACS:  31.15.A- (Ab initio calculations) (Electron electric dipole moment)  
  31.30.jr (QED corrections (Lamb shift) in muonic hydrogen and deuterium)  
  32.80.Aa (Inner-shell excitation and ionization)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 91126007, 11274254, 10964010, and 11064012).
Corresponding Authors:  Dong Chen-Zhong     E-mail:
About author:  31.15.A-;; 31.30.jr; 32.80.Aa

Cite this article: 

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 2014 Chin. Phys. B 23 023101

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