摘要
应用相对论组态相互作用方法,计算了类氦氪离子(Kr34+)经过1s2lnl'(n=2,3,…,15)态的双电子复合截面,然后在冲量近似下计算了Kr34+与CH4、NH3、H2O和HF共振转移激发(RTE)截面.在低动量端,CH4、NH3、H2O和HF的康普顿轮廓依次减小.相比Kr34+与CH4的RTE截面,Kr34+与NH3、H2O和HF的RTE截面在第1个峰位处截面值分别减小10.7%、23.3%和33.6%,在第2个峰位处截面值分别减小6.0%、12.3%和18.9%.同时,RTE峰的宽度依次增加,这表明随着C、N、O和F的核电荷数增加,库仑作用导致电子动量空间分布变大.
The relativistic configuration interaction method is employed to investigate the resonant transfer excitation （RTE） processes of Kr34＋ colliding with CH4, NH3, H20, and HF targets under the impulse approximation. Compared to the case of CH4, the RTE cross sections of NH3, H20, and HF targets reduce by 10.7% , 23.3% , and 33.6% in the first peak position and by 6.0% , 12.3% , and 18.9% in the second peak position, respectively, due to the decrease in Compton profiles in the small momentum region. On the other hand, the width of the peaks increases from CH4 to HF, which indicates that strong Coulomb effect leads to the broader momentum distribution.
出处
《中国科学院研究生院学报》
CAS
CSCD
北大核心
2013年第2期172-178,共7页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
国家自然科学基金(1179041)
国家自然科学基金委-中国工程物理研究院联合基金(NSAF10876043)资助
关键词
双电子复合
共振转移激发
康普顿轮廓
dielectronic recombination
resonant transfer excitation
Compton profile
