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Chin. Phys. B, 2018, Vol. 27(6): 063201    DOI: 10.1088/1674-1056/27/6/063201
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Single and double Auger decay of 4f-ionized mercury including cascade and direct processes

Yu-Long Ma(马玉龙)1, Fu-Yang Zhou(周福阳)2, Zhen-Qi Liu(刘振旗)1, Yi-Zhi Qu(屈一至)1
1 College of Material Sciences and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
2 Data Center for High Energy Density Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
Abstract  

Single (SA) and double (DA) Auger decay including cascade and direct processes are investigated for Hg 4f-1 with multiconfiguration Dirac-Fock method and two-step approaches, i.e., knockout and shakeoff mechanisms. Due to the computational effort, only the major transitions are considered to describe the SA and DA decays for the Hg+ ions with complex electronic configurations. In order to estimate the Auger transition energies and amplitudes, the reference configuration sets producing the configuration state functions are carefully chosen for balancing electron correlations among the successive singly, doubly and triply ionized mercury. The Auger rates and electron spectra, DA probabilities as well as the populations of the final Hg3+ states are obtained. Our results well explain the recent experimental data about the 4f hole states of Hg[Palaudoux J et al., Phys. Rev. A 91 012513 (2015)], and could provide guidance for further studies on complex atoms. Particularly for the DA decay, the contributions of the direct processes, which are neglected in their calculations, are found to be important, accounting for as high as about 38% and 34% of the total DA decays for the 4f7/2-1 and 4f5/2-1, respectively.

Keywords:  single Auger      cascade double Auger      direct double Auger      Hg 4f-1  
Received:  05 March 2018      Revised:  03 April 2018      Accepted manuscript online: 
PACS:  32.80.Hd (Auger effect)  
  32.80.Zb (Autoionization)  
  31.15.vj (Electron correlation calculations for atoms and ions: excited states)  
Fund: 

Project supported by the National Key Research and Development Program of China (Grant No.2017YFA0402300),the National Natural Science Foundation of China (Grant Nos.11774344 and 11474033),and the Joint Foundation of the National Natural Science Foundation and the China Academy of Engineering Physics (Grant No.U1330117).

Corresponding Authors:  Yi-Zhi Qu     E-mail:  yzqu@ucas.ac.cn

Cite this article: 

Yu-Long Ma(马玉龙), Fu-Yang Zhou(周福阳), Zhen-Qi Liu(刘振旗), Yi-Zhi Qu(屈一至) Single and double Auger decay of 4f-ionized mercury including cascade and direct processes 2018 Chin. Phys. B 27 063201

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