Electron impact excitation rate coefficients of N II ion  

作　　者：杨宁选 董晨钟 蒋军 颉录有 

机构地区：[1]College of Physics and Electronics Engineering,Northwest Normal University [2]Joint Laboratory of Atomic and Molecular Physics,NWNU&IMP CAS

出　　处：《Chinese Physics B》2010年第9期303-308,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.10774122 and 10876028);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.20070736001);the Technology and Innovation Program of Northwest Normal University (Grant No.NWNU-KJCXGC-03-21)

摘　　要：This paper calculates the electron impact excitation rate coefficients from the ground term 2s^22p^2 3p to the excited terms of the 2s^22p^2, 2s^2p^3, 2s^22p3s, 2s^22p3p, and 2s^22p3d configurations of N II. In the calculations, multiconfiguration Dirac-Fork wave functions have been applied to describe the target-ion states and relativistic distorted-wave calculation has been performed to generate fine-structure collision strengths. The collision strengths are then averaged over a Maxwellian distribution of electron velocities in order to generate the effective collision strengths. The calculated rate coefficients are compared with available experimental and theoretical data, and some good agreements are found for the outer shell electron excitations. But for the inner shell electron excitations there are still some differences between the present calculations and available experiments.This paper calculates the electron impact excitation rate coefficients from the ground term 2s^22p^2 3p to the excited terms of the 2s^22p^2, 2s^2p^3, 2s^22p3s, 2s^22p3p, and 2s^22p3d configurations of N II. In the calculations, multiconfiguration Dirac-Fork wave functions have been applied to describe the target-ion states and relativistic distorted-wave calculation has been performed to generate fine-structure collision strengths. The collision strengths are then averaged over a Maxwellian distribution of electron velocities in order to generate the effective collision strengths. The calculated rate coefficients are compared with available experimental and theoretical data, and some good agreements are found for the outer shell electron excitations. But for the inner shell electron excitations there are still some differences between the present calculations and available experiments.

关 键 词：relativistic distorted-wave method multiconfiguration Dirac Fork method configuration interaction rate coefficients 

分 类 号：O562[理学—原子与分子物理]