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首页> 外文期刊>The Journal of Chemical Physics >FOURIER TRANSFORM EMISSION SPECTROSCOPY OF THE B (1)PI-X(1)SIGMA(+), C (1)SIGMA(+)-X (1)SIGMA(+), AND G (1)PI-X (1)SIGMA(+) SYSTEMS OF SCH AND SCD
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FOURIER TRANSFORM EMISSION SPECTROSCOPY OF THE B (1)PI-X(1)SIGMA(+), C (1)SIGMA(+)-X (1)SIGMA(+), AND G (1)PI-X (1)SIGMA(+) SYSTEMS OF SCH AND SCD

机译：B（1）PI-X（1）SIGMA（+），C（1）SIGMA（+）-X（1）SIGMA（+）和G（1）PI-X（1）的傅里叶变换发射光谱SCH和SCD的SIGMA（+）系统

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The emission spectra of ScH and ScD have been observed in the 380 nm-2.5 mu m spectral region using a Fourier transform spectrometer. The molecules were excited in a scandium hollow cathode lamp operated with neon gas and a trace of hydrogen or deuterium. Three transitions with a common lower state, assigned as the ground X (1) Sigma- (+) state, have br:en observed in the near infrared and visible regions. The ScH bands with 0-0 band origins at 5404, 13 574, and 20 547 cm(-1) have been assigned as the B (1) Pi-X (1) Sigma(+), C (1) Sigma(+)-X (1) Sigma(+), and G (1) Pi-X (1) Sigma(+) transitions, respectively. A rotational analysis of the 0-0, 1-1, 1-0, and 2-1 bands of the B (1) Pi-X (1) Sigma(+) system, the 0-0 and 1-1 bands of the C (1) Sigma(+)-X (1) Sigma(+) system and the 0-0 band of the G (1) Pi-X (1) Sigma(+) system has been obtained. The principal molecular constants for the X (1) Sigma(+) state of ScH are Delta G(1/2)= 1546.9730(14) cm(-1), B-e=5.425 432(48) cm(-1) alpha(e)=0.124802(84) cm(-1) and r(e)=1.775 427(8) Angstrom. The corresponding band systems of ScD have also been analyzed. A rotational analysis of the 0-0, 1-1, and 1-0 bands of the B (1) Pi-X 1 Sigma(+) system, the 0-0, 1-1, 0-1, and 1-2 bands of the C (1) Sigma(+)-X (1) Sigma(+) system and the 0-0 band of the G (1) Pi-X (1) Sigma(+) system has been obtained. The equilibrium molecular constants determined for the ground state of ScD are omega(e)=1141.2650(31) cm(-1), omega(e)x(e) = 12.3799(15) cm(-1), B-e=2.787 432(41) cm(-1), alpha(e)=0.045 321(73) cm(-1), and r(e)=1.771 219( 3) Angstrom. The ScH assignments are supported by recent theoretical predictions made by Anglada et al. [Mol. Phys. 66, 541 (1989)] as well as the experimental results available for ScF and the isovalent YH and LaH molecules. Although some unassigned bands have been attributed to ScH and ScD by previous workers, there have been no previous analyses of ScH or ScD spectra. (C) 1996 American Institute of Physics. [References: 33]
机译：使用傅立叶变换光谱仪已在380 nm-2.5μm光谱范围内观察到ScH和ScD的发射光谱。在用氖气和痕量氢或氘操作的operated空心阴极灯中激发分子。在近红外和可见光区域观察到三个具有共同下态的跃迁，它们被指定为基态X（1）Sigma-（+）状态。具有0-0波段起源的5404、13574和20547 cm（-1）的ScH波段已被指定为B（1）Pi-X（1）Sigma（+），C（1）Sigma（+ ）-X（1）Sigma（+）和G（1）Pi-X（1）Sigma（+）过渡。对B（1）Pi-X（1）Sigma（+）系统的0-0、1-1、1-0和2-1波段进行旋转分析，对0（0）和1-1的波段进行旋转分析已获得C（1）Sigma（+）-X（1）Sigma（+）系统和G（1）Pi-X（1）Sigma（+）系统的0-0谱带。 ScH的X（1）Sigma（+）状态的主要分子常数为Delta G（1/2）= 1546.9730（14）cm（-1），Be = 5.425 432（48）cm（-1）alpha（ e）= 0.124802（84）cm（-1）和r（e）= 1.775 427（8）埃。还对ScD的相应频段系统进行了分析。 B（1）Pi-X 1 Sigma（+）系统0-0、1-1、0-1和1-的0-0、1-1和1-0波段的旋转分析已获得C（1）Sigma（+）-X（1）Sigma（+）系统的2条谱带和G（1）Pi-X（1）Sigma（+）系统的0-0谱带。为ScD的基态确定的平衡分子常数为ω（e）= 1141.2650（31）cm（-1），omega（e）x（e）= 12.3799（15）cm（-1），Be = 2.787 432 （41）cm（-1），alpha（e）= 0.045 321（73）cm（-1）和r（e）= 1.771 219（3）埃。 ScH任务得到了Anglada等人最近的理论预测的支持。 [摩尔物理66，541（1989）]以及可用于ScF以及等价YH和LaH分子的实验结果。尽管以前的工作人员将某些未分配的波段归因于ScH和ScD，但以前没有对ScH或ScD光谱进行分析。 （C）1996年美国物理研究所。 [参考：33]

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