Open AccessFully relativistic distorted-wave calculations for electron impact excitation of highly chargednickel-like ions
Author(s) -
Xie Lu-You,
Zhiyuan Zhang,
Chenzhong Dong,
Jun Jiang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.6249
Subject(s) - atomic physics , excitation , ion , physics , electron , collision , ground state , collisional excitation , electron ionization , nuclear physics , ionization , quantum mechanics , computer security , computer science
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 studywe calculated the collision strengthscross 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 calculationsthe relativistic effectselectron correlation effectsBreit interactions and high partial wave contributions are considered systematically. Based on the calculationswe studied the contribution of Breit interaction to collision strengthsthe cross sections connected with the strongest 4d-4p (J=0—1) X-ray laser transitions along the Ni-like sequenceand 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+ ionsand rate coefficients of Gd36+ iongood agreement was obtained.