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首页> 外文期刊>Chinese science bulletin >Resonance-enhanced multiphoton ionization spectroscopy on the B'~2Σ~+ and B~2Π states of NS
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Resonance-enhanced multiphoton ionization spectroscopy on the B'~2Σ~+ and B~2Π states of NS

机译：NS的B'〜2Σ〜+和B〜2Π态的共振增强多光子电离光谱

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摘要

Resonance-enhanced multiphoton ionization (REMPI) spectra of N~(32)S and N~(34)S have been recorded in the range of 35700—40200 cm~(-1). The radical was generated by a pulsed dc discharge of a mixture of SF_6 and N_2 under a supersonic free jet condition. All the 16 observed bands of N~(32)S radicals have been assigned, among which 12 bands belong to three transition progressions (v'=0-4, 0), (v'=1-4, 1) and (v'=2-4, 2) from the X~2Π ground state to the B'~2Σ~+ upper state and the rest correspond to (9,0), (10,0), (11, 0) and (12, 0) bands of B~2Π-X~2Π transition, respectively. Analysis of the rotationally resolved spectra yields exhaustive spectroscopic constants of both the X~2Π ground state and the B'~2Σ~+ excited state. The electronic transition bands of the isotopic molecule N~(34)S have been rotationally analyzed for the first time and the rotational constants of the ground and upper states have been determined simultaneously.
机译：N〜（32）S和N〜（34）S的共振增强多光子电离（REMPI）光谱已记录在35700-40200 cm〜（-1）范围内。通过在超音速自由射流条件下对SF_6和N_2的混合物进行脉冲直流放电产生自由基。已分配了N〜（32）S个基团的全部16条观察带，其中12条带属于三个过渡进程（v'= 0-4，0），（v'= 1-4、1）和（v '= 2-4，2）从X〜2Π基态到B'〜2Σ〜+上态，其余分别对应于（9,0），（10,0），（11，0）和（12 ，0）分别是B〜2Π-X〜2Π跃迁的波段。旋转解析光谱的分析得出X〜2Π基态和B'〜2Σ〜+激发态的详尽的光谱常数。首次对同位素分子N〜（34）S的电子跃迁带进行了旋转分析，同时确定了基态和上态的旋转常数。

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