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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >L-shell electron excitations of Mg- through O-like tungsten ions
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L-shell electron excitations of Mg- through O-like tungsten ions

机译：Mg-到O样钨离子的L壳电子激发

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摘要

Electron impact excitations from ground state L shell viz. n = 2→n = 3 transitions in Mg-like W~(62+), Na-like W~(63+), Ne-like W~(64+), F-like W~(65+) and O-like W~(66+) ions have been considered. A fully relativistic distorted wave (RDW) theory has been used to calculate the excitation crosssections for an electric and magnetic dipole, as well as for the quadrupole transitions for these ions, which were observed recently in the measurements taken from an electron-beam-ion trap (EBIT-I) at the Livermore laboratory. We have performed calculations in the electron impact energy range from a threshold excitation energy of up to 60 keV. Our results, where possible, have been compared with the few previous theoretical calculations that are available. Analytic fits to our calculated excitation cross-sections have also been done for plasma modeling purposes. Our calculated cross-sections have been further employed to obtain the linear polarization of the photon emissions for dipole-allowed transitions due to the decay of the electron impact excited anisotropic states to the ground state for all five of the tungsten ions that are considered in the present work.
机译：来自基态L shell的电子冲击激发。在Mg类W〜（62 +），Na类W〜（63 +），Ne类W〜（64 +），F类W〜（65+）和O中n = 2→n = 3个跃迁已经考虑了类似的W〜（66+）离子。完全相对论的畸变波（RDW）理论已用于计算电和磁偶极子以及这些离子的四极子跃迁的激发截面，最近在从电子束离子获取的测量中观察到利弗莫尔实验室的捕集阱（EBIT-I）。我们已经在从60keV的阈值激发能的电子冲击能范围内进行了计算。我们的结果在可能的情况下已与现有的少量理论计算进行了比较。为了进行等离子体建模，还对我们计算的激发截面进行了分析拟合。我们计算出的横截面已被进一步用于获得偶极子跃迁的光子发射的线性极化，这是由于电子冲击激发的各向异性态对所有五个钨离子中基态的衰减所致。目前的工作。

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