Resonance enhanced electron impact excitation for P-like Cu XV

• 作者: 李传莹 李双 陈重阳 颜君 黄敏
• 来源期刊: 中国物理B（英文版）
• 关键词: electron impact excitation resonance excitation collision strength Dirac?-matrix theory
• 年，卷（期）: 2015,（11）
• 页码范围: 113401-1-113401-7
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/11/113401

摘要

Employing both the Dirac?-matrix and the relativistic distorted wave with independent process and isolated reso-nance approaches, we report resonance enhanced electron impact excitation data (specifically, effective collision strengths) among the lowest 41 levels from the n=3 configurations of Cu XV. The results show that the latter approach can obtain resonance contributions reasonably well for most excitations of Cu XV, though a comparison between the two approaches shows that the close-coupling effects are truly significant for rather weak excitations, especially for two-electron excitations from the 3s3p4 to 3s23p23d configuration. Resonance contributions are significant (more than two orders of magnitude) for many excitations and dramatically infl uence the line intensity ratios associated with density diagnostics.