Observation and analysis of a new [14.26]0+ – X 3Σ–0+ transition of WS, observed using intracavity laser spectroscopy with Fourier-transform detection
Observation and analysis of a new [14.26]0+ – X 3Σ–0+ transition of WS, observed using intracavity laser spectroscopy with Fourier-transform detection
复制标题
使用腔内激光光谱和傅里叶变换检测观察和分析 WS 的新 [14.26]0+ – X 3Σ–0+ 跃迁
DOI：
10.1016/j.jms.2020.111378
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发表时间：
2020
影响因子：
1.4
通讯作者：
L. O'Brien
中科院分区：
文献类型：
--
作者：
Jack C. Harms;Kristin N. Bales;J. O'Brien;L. O'Brien
描述了WS的一个新的[14.26]0 ~+-X3 ~+-0 ~+跃迁的（1，0），（0，1）和（1，2）带.在总压为1-2 μ m、含0.1%CS_2、~ 30%H_2和~ 70%Ar的气氛中，将0.15 A DC等离子体电流或0.80 A RF脉冲DC等离子体电流施加到W内衬的Cu空心阴极上，在所形成的等离子体放电中产生WS分子。空心阴极位于Ti：蓝宝石或染料激光器（具有DCM激光染料）的谐振腔中，导致分子吸收叠加在激光器的可调谐宽带轮廓上。使用仪器分辨率设置为0.01 cm-1的Bruker IFS 125 M光谱仪检测该曲线。ILS-FTS测量的有效路径长度为170 m（Δv = +1）和535 m（Δv = -1）。使用PGOPHER旋转分析ILS-FTS光谱。对于所有三个带识别182 W32 S、183 W32 S、184 W32 S和186 W32 S的跃迁，并且在PGOPHER中建立质量无关的Dunham模型以拟合WS的X3 π-0+基态。J. Mol. Spectrosc.359（2019）31]和我们对[13.10]1-X3 π-0+跃迁的（1，0）带的分析[Harmset等人，J. Mol. Spectrosc.372（2020）111349]包含在PGOPHER拟合中。实验观察到的状态和从头算预测的状态之间的相关图[Tsanget al.]用于阐明WS的复杂电子光谱。
The (1,0), (0,1), and (1,2) bands of a new [14.26]0+–X3Σ–0+transition of WS are described. The WS molecules were produced in the plasma discharge formed when either a 0.15 A DC plasma current or a 0.80 A RF-pulsed DC plasma current was applied to a W-lined Cu hollow cathode in an atmosphere that was 0.1%CS2, ~30% H2and ~70% Ar at a total pressure of 1–2 torr. The hollow cathode was located in the resonator cavity of either a Ti:Sapphire or dye laser (with DCM laser dye), causing molecular absorption to be superimposed upon the tunable broadband profile of the laser. This profile was detected using a Bruker IFS 125 M spectrometer with an instrument resolution set to 0.01 cm−1. Effective pathlengths for the ILS-FTS measurements were 170 m (Δv = +1) and 535 m (Δv = –1). The ILS-FTS spectra were rotationally analyzed using PGOPHER. Transitions of182W32S,183W32S,184W32S, and186W32S were identified for all three bands, and a mass-independent Dunham model was built in PGOPHER to fit theX3Σ–0+ground state of WS. Experimental line positions from the laser induced fluorescence (LIF) spectrum of WS [Tsanget al., J. Mol. Spectrosc.359(2019) 31] and our analysis of the (1,0) band of the [13.10]1–X3Σ–0+transition [Harmset al.,J. Mol. Spectrosc.372(2020) 111349] were included in the PGOPHER fit. A correlation diagram between the experimentally observed states and those predictedab initio[Tsanget al.] is used to shed light on the complex electronic spectrum of WS.