计算物理 ›› 2000, Vol. 17 ›› Issue (S1): 33-38.DOI: 10.3969/j.issn.1001-246X.2000.01.007

• 论文 • 上一篇    下一篇

U91+离子碰撞强度和速率系数的相对论理论计算

鲁晓军1, 邹宇2, 邱玉波2, 方泉玉2   

  1. 1. 中国工程物理研究院北京研究生部, 北京 100088;
    2. 北京应用物理与计算数学研究所, 北京 100088
  • 收稿日期:1999-08-27 修回日期:1999-11-07 出版日期:2000-12-25 发布日期:2000-12-25
  • 作者简介:鲁晓军(1976~),男,河南许昌,硕士生,从事理论原子物坪及应用研究
  • 基金资助:
    国家自然科学基金;国家863计划惯性约束聚变技术主题;中国工程物理研究院科学技术基金资助

RELATIVISTIC CALCULATION OF COLLISION STRENGTHS AND RATE COEFFICIENTS OF U91+ ION

LU Xiao-jun1, ZOU Yu2, QIU Yu-bo2, FANG Quan-yu2   

  1. 1. Graduate School of China Academy of Engineering Physics, Beijing, 100088, P R China;
    2. Institute of Applied Physics and Computational Mathematics, Beijing, 100088, P R China
  • Received:1999-08-27 Revised:1999-11-07 Online:2000-12-25 Published:2000-12-25

摘要: 介绍了用相对论多通道理论结合量子亏损理论计算电子碰撞激发过程的方法。用此方法计算了U91+离子电子碰撞激发的碰撞强度和有效碰撞强度及速率系数。与R矩阵方法的计算结果比较表明:在激发能量阈值附近还有一组共振结构;目前的方法对共振结构的描述更精细完整。根据碰撞强度,通过对电子速度的麦克斯韦分布积分得到了有效碰撞强度与温度的关系。可以看出,碰撞强度在能量阈值附近的共振峰使低温 1s-2s跃迁有效碰撞强度增大近20%。

关键词: 碰撞强度, 有效碰撞强度, 相对论多通道理论, 量子亏损理论

Abstract: A method combining the relativistic multichannel theory with the multichannel quantum defect theory is presented to calculate electron impact excitation. The collision strengths and rate coefficients of U91+ ion are computed with this method. Comparison with the results of R-matrix calculation shows that a) there exists another group of resonances near the excitation threshold; b)with the present method resonance structure can be fully resolved; c)the effective collison strength for 1s-2s transition at low temperiture is almost 20% enhanced by the resonances near the threshold.

Key words: collision strength, effective collision strength, relativistic multi-channel theory, quantum defect theory

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