类镍钨中禁带谱线的密度依赖性
Density dependence of the forbidden lines in Ni-like tungsten
摘要：
磁八极（M3）和电四极（E2）之间的基态$3d^{10} ^1S_0$和最低激发的$3d^94s$ $(5/2,1/2)$ J = 3和J = 2状态的Ni类钨的过渡显示出强烈的依赖于电子密度$N_e$在托卡马克等离子体的典型值的范围内。值得注意的是，这些重叠谱线的总强度几乎保持恒定，这可以解释在托卡马克实验中观察到的7.93 μ m谱线中的强发射（Neu R等，1997 J Phys B { \bf 30} 5057）。利用的M3和E2线比的密度诊断在高光谱分辨率的实验进行了讨论。
英文摘要：
The magnetic-octupole (M3) and electric-quadrupole (E2) transitions between the ground state $3d^{10} ^1S_0$ and the lowest excited $3d^94s$ $(5/2,1/2)$ J = 3 and J = 2 states in the Ni-like tungsten are shown to exhibit a strong dependence on electron density $N_e$ in the range of values typical for tokamak plasmas. Remarkably, the total intensity of these overlapping lines remains almost constant, which may explain the strong emission in the 7.93 Åline observed in tokamak experiments (Neu R et al. 1997 J Phys B {\bf 30} 5057). Utilization of the M3 and E2 line ratios for density diagnostics in high-spectral-resolution experiments is discussed as well.
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