Several bands in a new electronic transition of tungsten sulfide, WS, have been recorded at Doppler-limited resolution using intracavity laser spectroscopy with Fourier-transform detection (ILS-FTS). WS molecules were produced in the plasma discharge of a W-lined Cu hollow cathode in the presence of a gas mixture containing approximately 70% Ar and 30% H₂, with a trace amount of CS₂ at a total pressure of 1 torr. The (0,0), (1,0), (2,0), (1,1), (2,1), and (3,1) bands of the [15.05]0⁺ – X ³Σ^–(0⁺) transition of WS were observed. Line positions for the four major isotopologues (¹⁸²W³²S, ¹⁸³W³²S, ¹⁸⁴W³²S, and ¹⁸⁶W³²S) of the (0,0), (1,0), and (2,0) bands were used in the fit. The WS bands were analyzed using PGOPHER, with previously determined constants for the X ³Σ^–(0⁺) ground state [Harms et al., J. Mol. Spectrosc. 374, 111,378 (2020)] held fixed in the fit. A perturbation was observed in the (0,0) band which appears to be caused by an electronic state that has not been observed. Molecular parameters for the newly identified excited state are presented.

使用具有傅里叶变换检测（ILS-FTS）的腔内激光光谱技术，以多普勒限定的分辨率记录了新的硫化钨电子跃迁WS中的几个谱带。WS分子是在W衬里的Cu空心阴极在包含约70％Ar和30％H ₂，以及痕量CS ₂的气体混合物的存在下，在1torr的总压力下的等离子体放电中产生的。的（0,0），（1,0），（2,0），（1,1），（2,1），和（3,1）中的[15.05] 0的频带⁺ - X  ³ Σ ^-观察到WS的（0 ⁺）转变。四个主要同位素的线位置（¹⁸² W ³² S，¹⁸³ W在拟合中使用了（0,0），（1,0）和（2,0）频段的³² S，¹⁸⁴ W ³² S和¹⁸⁶ W ³² S）。使用PGOPHER的WS频带进行了分析，与用于预先确定的常数 X  ³ Σ ^-（0 ⁺）基态[危害等。，J。Mol。光谱。 374，111378（2020）]保持固定在合适的。在（0,0）谱带中观察到扰动，这似乎是由尚未观察到的电子状态引起的。提出了新确定的激发态的分子参数。