Analysis of soft x-ray emission spectra of laser-produced dysprosium, erbium and thulium plasmas
Analysis of soft x-ray emission spectra of laser-produced dysprosium, erbium and thulium plasmas
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DOI：
10.1088/1361-6455/aa5e62
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
J. Sheil;P. Dunne;T. Higashiguchi;D. Kos;E. Long;T. Miyazaki;F. O’Reilly;G. O'Sullivan;
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文献类型：
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作者：
J. Sheil;P. Dunne;T. Higashiguchi;D. Kos;E. Long;T. Miyazaki;F. O’Reilly;G. O'Sullivan;
用平场掠入射光谱仪在2.5-8 nm光谱范围内记录了在激光产生的等离子体中产生的Dy、Er和Tu离子的软X射线发射光谱。用脉冲宽度为7 ns的激光产生离子，并记录了不同功率密度下的光谱。利用Cowan原子结构程序和柔性原子程序对实验光谱进行了解释。当波长大于5.5 nm时，光谱主要由相邻离子级的n=4−n=4个未分辨跃迁阵列重叠而成。在6 nm以下，n=4−n=5跃迁也产生了一系列有趣的重叠光谱特征。
Soft x-ray emission spectra of dysprosium, erbium and thulium ions created in laser-produced plasmas were recorded with a flat-field grazing-incidence spectrometer in the 2.5–8 nm spectral range. The ions were produced using an Nd:YAG laser of 7 ns pulse duration and the spectra were recorded at various power densities. The experimental spectra were interpreted with the aid of the Cowan suite of atomic structure codes and the flexible atomic code. At wavelengths above 5.5 nm the spectra are dominated by overlapping n = 4 − n = 4 unresolved transition arrays from adjacent ion stages. Below 6 nm, n = 4 − n = 5 transitions also give rise to a series of interesting overlapping spectral features.