Collision strengths and rate coefficients for excitation of He-like ions by electron impact

✍ Scribed by S. Nakazaki; A. Ohsaki; E. Kimura; K.A. Berrington; P.H. Norrington

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 172 KB
• Volume: 235
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2005.03.182

✦ Synopsis

We present collision strengths and rate coefficients for electron-impact excitation of He-like ions (S 14+ , Ar 16+ , Ca 18+ ) using the Dirac Atomic R-matrix Code, which has been developed by Norrington and Grant [J. Phys. B: At. Mol. Opt. Phys. 20 (1987) 4869]. The lowest 45 target levels are included in the calculation to obtain the rate coefficients for the 1s 2 1 S 0 -1snl 1,3 L J (n = 2,3,4; l = 0, 1, 2, 3). Results are compared with those available in previous calculations.