Laser spectroscopy of holmium monosulphide: Electronic, vibrational and rotational structure of the A[14.79]8.5–X8.5, A[14.79]8.5–W[0.25]7.5 and A[14.79]8.5–V[0.98]7.5 transitions

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• 作者：C. Linton ; A.G. Read
• 关键词：Holmium monosulphide ; Electronic spectrum ; Rotational structure ; Hyperfine structure ; Laser induced fluorescence ; Laser excitation spectroscopy
• 刊名：Journal of Molecular Spectroscopy
• 出版年：2006
• 期刊代码：129_00222852
• 类别：ch
• 出版时间：November 2006
• 卷：240
• 期：1
• 页码：133-138
• 文件大小：206 K

摘要

Laser induced fluorescence spectra of HoS have been obtained using a Broida oven and a ring dye laser. Dispersed fluorescence spectra showed transitions from a common upper state, A[14.79]8.5 to the v = 0 and 1 vibrational levels of three low lying states, labelled X8.5, W[0.25]7.5 and V[0.98]7.5 (the states are labelled [10⁻³T₀]Ω according to their energy and Ω assignment). High resolution excitation spectra were obtained for all six transitions and a rotational analysis yielded the following principal constants, in cm⁻¹, for the X, W and V states, respectively: T₀ = 0, 251.8713(31), 980.6969(37); B_e = 0.121903(42), 0.121729(37), 0.122561(34); ΔG_1/2 = 463.8811(46), 462.9411(45), 461.2084(127). For the A state, T₀ = 14794.6987(28) cm⁻¹ and B₀ = 0.112596(29) cm⁻¹. The three low lying states are shown to arise from the Ho²⁺[4f¹⁰(⁵I₈)6s]S²⁻ configuration in accord with Ligand Field Theory predictions. The atomic origin of each of the three low lying electronic states was determined from the observed resolved hyperfine structure.