Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions
Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions
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DOI：
10.1088/1361-6455/ab8716
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发表时间：
2020-06
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影响因子：
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通讯作者：
-Dipti;R. Silwal;J. Dreiling;S. Sanders;E. Takacs;Y. Ralchenko
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作者：
-Dipti;R. Silwal;J. Dreiling;S. Sanders;E. Takacs;Y. Ralchenko
使用平场掠入射光谱仪在约 4 nm-20 nm 的波长范围内观察了美国国家标准技术研究院电子束离子阱中产生的高电荷镱离子的极紫外光谱。通过非麦克斯韦 EBIT 等离子体的碰撞辐射模型的详细分析来解释测量的光谱。在类 Rb Yb33+ 到类 Ni Yb42+ 离子中，识别出了由壳内 (Δn = 0, n = 4) 电偶极子、磁偶极子和电四极子跃迁引起的 79 条新谱线。针对多个电离阶段讨论了 n = 4 复合物内强构型相互作用对测量光谱的影响。
Extreme ultraviolet spectra of highly-charged ytterbium ions produced in an electron beam ion trap at the National Institute of Standards and Technology were observed with a flat-field grazing incidence spectrometer in the wavelength region of about 4 nm–20 nm. The measured spectra were interpreted through detailed analysis by collisional-radiative modeling of the non-Maxwellian EBIT plasma. Seventy-nine new spectral lines due to intrashell (Δn = 0, n = 4) electric–dipole, magnetic–dipole, and electric–quadrupole transitions were identified in Rb-like Yb33+ through Ni-like Yb42+ ions. The effects of strong configuration interaction within the n = 4 complex on the measured spectra are discussed for a number of ionization stages.