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Fully relativistic distorted-wave calculations for electron impact excitation of highly chargednickel-like ions

Xie Lu-You Zhang Zhi-Yuan Jiang Jun Dong Chen-Zhong

Fully relativistic distorted-wave calculations for electron impact excitation of highly chargednickel-like ions

Xie Lu-You, Zhang Zhi-Yuan, Jiang Jun, Dong Chen-Zhong
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  • Received Date:  31 March 2008
  • Accepted Date:  25 April 2008
  • Published Online:  20 October 2008

Fully relativistic distorted-wave calculations for electron impact excitation of highly chargednickel-like ions

  • 1. (1)西北师范大学物理与电子工程学院,兰州 730070; (2)西北师范大学物理与电子工程学院,兰州 730070;兰州重离子加速器国家实验室原子核理论研究中心,兰州 730000

Abstract: A fully relativistic distorted-wave method and the corresponding procedure REIE06 have been developed recently to study the electron impact excitation processes of highly charged ions. In this study,we calculated the collision strengths,cross sections and rate coefficients for electron impact excitation of highly charged Nickel-like Gd36+,Rn58+—U64+(Z=86—92)ions from the ground state to 106 low-lying excitated states. In the calculations,the relativistic effects,electron correlation effects,Breit interactions and high partial wave contributions are considered systematically. Based on the calculations,we studied the contribution of Breit interaction to collision strengths,the cross sections connected with the strongest 4d-4p (J=0—1) X-ray laser transitions along the Ni-like sequence,and the effects of strong configuration interaction on cross sections from the ground state 3d101S0 to the (3d3/24d5/2)1,(3d3/24d3/2)1 and (3p3/24p1/2)1 states. A comparison was made between the present results and previous theoretical calculations for collision strengths of Gd36+ and U64+ ions,and rate coefficients of Gd36+ ion,good agreement was obtained.

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