摘要
The relativistic multichannel theory has been applied and a nonperturbative formula adopted to calculate the dielectronic recombination cross section due toΔN=1 resonances for the ground state C4^(+).The first-order approximation is adopted for the radiative process and a correction based on the isolated resonance approximation is used for the very narrow resonances to include the radiation width.The convoluted cross section is in agreement within 5%with that of observation for resonances with n≤5.For n=6 and 7,the integral cross section is overestimated by a factor of 6 and 4,respectively.According to our calculation,the Rydberg cut-off due to field ionization should be at a principal quantum number higher than that given by Mannervik et al.A Small relativistic effect is noticed at intrashell resonance.
作者
刘勇
邹宇
方泉玉
徐雅琼
LIU Yong;ZOU Yu;FANG Quan-Yu;XU Ya-Qiong(Institute of Applied Physics and Computational Mathematics,P.O.Box 8009,Beijing 100088;Center of Atomic and Molecular Science,Tsinghua University,Beijing 100084;Institute of Physics,Chinese Academy of Sciences,Beijing 100080)
基金
Supported by the National Natural Science Foundation of China under Grant No.19974006,and in part by the National High-Tech ICF Committee in China.