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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Low-Lying Electronic States in Bismuth Trimer Bi-3 As Revealed by Laser-Induced NIR Emission Spectroscopy in Solid Ne
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Low-Lying Electronic States in Bismuth Trimer Bi-3 As Revealed by Laser-Induced NIR Emission Spectroscopy in Solid Ne

机译：固体氖中激光诱导的NIR发射光谱揭示了铋三聚体Bi-3中的低电子态

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摘要

Laser-induced near-infrared (NIR) emission spectra of neutral bismuth timer, Bi-3, embedded in solid neon matrixes at 3 K were recorded in a range 870-1670 nm. Using photoexcitation with low energy photons at 1064 nm, two emission band systems were newly identified by their origin bands at T-0 = 6600 and 8470 cm(-1). Accordingly, spectral assignment for three NIR emission band systems reported recently was partly revised for the one with its origin band at T-0 = 7755 cm(-1) and reconfirmed for the others at T-0 = 9625 and 11 395 cm(-1). Energy splitting by spin-orbit coupling between the pair of electronic energy levels in the ground state of bismuth trimer, Bi-3, both having a totally symmetric vibrational mode of frequency at omega"(e) = 150 cm(-1), was determined to be 1870 +/- 1.5 cm(-1). Transitions from the pair of electronically excited states, locating at T-0 = 8470 and 9625 cm(-1) above the ground state and separated by spin-orbit coupling of 1155 cm(-1), have relatively long decay constants of tau similar to 0.2 and similar to 0.1 ms, respectively.
机译：在3K下嵌入固体霓虹灯基质中的Bi-3中性铋计时器Bi-3的激光诱导近红外（NIR）发射光谱记录在870-1670 nm范围内。使用低能量光子在1064 nm处的光激发，通过发射带在T-0 = 6600和8470 cm（-1）处新识别出两个发射带系统。因此，对最近报告的三个NIR发射带系统的光谱分配进行了部分修订，其中一个的原始带在T-0 = 7755 cm（-1），对于其他的NIR发射带在T-0 = 9625和11395 cm（- 1）。在铋微晶基态Bi-3的一对电子能级之间通过自旋轨道耦合进行能量分裂，Bi-3都具有ω“（e）= 150 cm（-1）处的频率的完全对称振动模式。确定为1870 +/- 1.5 cm（-1）。从一对电子激发态跃迁，位于基态之上的T-0 = 8470和9625 cm（-1），并通过自旋轨道耦合1155分离cm（-1）具有相对较长的tau衰减常数，分别类似于0.2和0.1 ms。

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