Photoionization of 1s Electron and Corresponding Shake-Up Process in Ground and Excited Lithium Atoms
SANG Cui-Cui, DING Xiao-Bin, DONG Chen-Zhong
1College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 7300702Joint Laboratory of Atomic and Molecular Physics, NWNU & IMP, CAS, Lanzhou 730070
Photoionization of 1s Electron and Corresponding Shake-Up Process in Ground and Excited Lithium Atoms
SANG Cui-Cui, DING Xiao-Bin, DONG Chen-Zhong
1College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 7300702Joint Laboratory of Atomic and Molecular Physics, NWNU & IMP, CAS, Lanzhou 730070
摘要The cross sections of the 1s electron photoionization and corresponding shake-up processes for Li atoms in the ground state 1s22s and excited states 1s22p, 1s23s, 1s23p and 1s23d are calculated usin the multi-configuration Dirac--Fock method. The latest experimental photoelectron spectrum at h\ν=100eV [Cubaynes D et al. Phys. Rev. Lett. 99(2007)213004] has been reproduced by the present theoretical investigation excellently. The relative intensity of the shake-up satellites shows that the effects of correlation and relaxation become more important for the higher excited states of the lithium atom, which are explained very well by the spatial overlap of the initial and final state wavefunctions. In addition, strong dependence of the cross section on the atomic orbitals of the valence electrons are found, especially near the threshold.
Abstract：The cross sections of the 1s electron photoionization and corresponding shake-up processes for Li atoms in the ground state 1s22s and excited states 1s22p, 1s23s, 1s23p and 1s23d are calculated usin the multi-configuration Dirac--Fock method. The latest experimental photoelectron spectrum at h\ν=100eV [Cubaynes D et al. Phys. Rev. Lett. 99(2007)213004] has been reproduced by the present theoretical investigation excellently. The relative intensity of the shake-up satellites shows that the effects of correlation and relaxation become more important for the higher excited states of the lithium atom, which are explained very well by the spatial overlap of the initial and final state wavefunctions. In addition, strong dependence of the cross section on the atomic orbitals of the valence electrons are found, especially near the threshold.
SANG Cui-Cui;DING Xiao-Bin;DONG Chen-Zhong. Photoionization of 1s Electron and Corresponding Shake-Up Process in Ground and Excited Lithium Atoms[J]. 中国物理快报, 2008, 25(10): 3624-3626.
SANG Cui-Cui, DING Xiao-Bin, DONG Chen-Zhong. Photoionization of 1s Electron and Corresponding Shake-Up Process in Ground and Excited Lithium Atoms. Chin. Phys. Lett., 2008, 25(10): 3624-3626.
[1] Matveev I and Parilis S 1982 Sov. Phys. Usp. 25 881 [2] Felfli Z and Manson S T 1992 Phys. Rev. Lett. 68 1687 [3] Zhou H L et al 1999 Phys. Rev. A 59 462 [4] Kupliauskiene A 1996 Phys. Scr. 53 149 [5] Cubaynes D et al 2007 Phys. Rev. Lett. 99213004 [6] Rak{stikas N and Kupliauskiene A 1998 Phys.Scr. 58 587 [7] Kupliauskiene A 1998 J. Phys. B: At. Mol. Phys. 31 2885 [8] Fang Q Y et al 2001 Acta. Phys. Sin. 50 655 [9] Chang T N et al 1982 J. Phys. B: At. Mol. Phys. 15 L835 [10] Salzmann D and Pratt R H 1984 Phys. Rev. A 30 2767 [11] Dong C Z and Fritzsche S 2005 Phys. Rev. A 72 012507 [12] Dong C Z et al 2006 Eur. Phys. J. D 40 317 [13] Dong C Z et al 2005 Chin. Phys. 14 1108 [14] Li J G et al 2007 Chin. Phys. Lett. 24 83 [15] Fricke B 1984 Phys. Scr. T8 129 [16] Parpia F A et al 1996 Comput. Phys. Commun. 94 249 [17] Fritzsche S 2001\, J. Elec. Spec. Rel.Phenom.\, 114-116\,1155 [18] Wan J J et al 2007 J. Phys.: Confer. Ser. 58367 [19] Moore C E 1971 Atomic Energy Levels (U.S. Natl.Bur. Stand.) p 8 [20] Cowan R D 1981 The Theory of Atomic Structure andSpectra (Berkeley: University of California Press) p 525
2008, Vol. 25 
