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

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

机构地区：[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

出　　处：《Chinese Physics B》2018年第6期244-250,共7页中国物理B（英文版）

基　　金：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);the Joint Foundation of the National Natural Science Foundation;the China Academy of Engineering Physics(Grant No.U1330117)

摘　　要：Single（SA） and double（DA） Auger decay including cascade and direct processes are investigated for Hg 4 f^（-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 Hg^（3＋）states are obtained. Our results well explain the recent experimental data about the 4 f 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 4 f（7/2）^（-1） and 4 f（5/2）^（-1）, respectively.Single（SA） and double（DA） Auger decay including cascade and direct processes are investigated for Hg 4 f^（-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 Hg^（3＋）states are obtained. Our results well explain the recent experimental data about the 4 f 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 4 f（7/2）^（-1） and 4 f（5/2）^（-1）, respectively.

关 键 词：single Auger cascade double Auger direct double Auger Hg 4f^-1 

分 类 号：O4[理学—物理]