Radiative rates and electron impact excitation rates for H-like Ar XVIII

Radiative rates and electron impact excitation rates for H-like Ar XVIII
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H 类 Ar XVIII 的辐射速率和电子碰撞激发速率

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发表时间：
2008
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通讯作者：
S. Nakazaki
S. Nakazaki
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文献类型：
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作者：
M. Aggarwal;K. Hamada;A. Igarashi;V. Jonauskas;F. Keenan;S. Nakazaki

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目标。本文报道了类氢Ar xviii的n ≤ 5组态的最低25个能级之间跃迁的能级、辐射率、碰撞强度和有效碰撞强度的计算结果。方法.计算采用了通用的相对论原子结构程序包（GRASS）和狄拉克原子R矩阵程序（DARC）。结果给出了25个能级中所有电偶极（E1）、磁偶极（M1）、电四极（E2）和磁四极（M2）跃迁的辐射率、振子强度和谱线强度。此外，碰撞强度和有效的碰撞强度列出了所有300跃迁在上述25个能级在宽的能量（温度）范围内高达800赖德（10 7。4 K）。
Aims. In this paper we report on calculations for energy levels, radiative rates, collision strengths, and e ff ective collision strengths for transitions among the lowest 25 levels of the n ≤ 5 configurations of H-like Ar xviii . Methods. The general-purpose relativistic atomic structure package ( grasp ) and Dirac atomic R -matrix code ( darc ) are adopted for the calculations. Results. Radiative rates, oscillator strengths, and line strengths are reported for all electric dipole (E1), magnetic dipole (M1), elec- tric quadrupole (E2), and magnetic quadrupole (M2) transitions among the 25 levels. Furthermore, collision strengths and e ff ective collision strengths are listed for all 300 transitions among the above 25 levels over a wide energy (temperature) range up to 800 Ryd (10 7 . 4 K).