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利用泵浦—检测技术,研究了K(6S)与H2反应生成的KH〔X1+(V,J)〕分子的转动态分布,利用激光感应荧光光谱(LIF),确定了v=0,1振动能级上的转动态分布。转动态分布与热统计分布基本一致。记录X1+(V,J)←A1+(V′,J+1)时间分辨荧光,从荧光强度的对数值给出的直线斜率得到它的自发辐射寿命。K激发态原子密度由激光能量吸收得到,反应生成物KH分子密度利用光学吸收法得到。由速率方程分析,得到σ(V,J),对J求和,得到的σ(v)分别为(1.4±0.6)×10-16cm2〔对v=0〕,σ(V)为(1.2±0.5)×10-16cm2〔对v=1〕。
The rotational state distribution of KH [X1 + (V, J)] molecule formed by the reaction of K (6S) with H2 was studied by using pump-detection technique. The vibrational state of v = 0,1 vibration was determined by laser induced fluorescence spectroscopy (LIF) The state of rotation on the level of distribution. Rotational distribution and thermal statistic distribution are basically the same. Time-resolved fluorescence is recorded as X1 + (V, J) ← A1 + (V ’, J + 1) and its spontaneous emission lifetime is derived from the slope of the line given by the logarithm of fluorescence intensity. K excited state atomic density obtained by the laser energy absorption, the reaction product KH molecular density obtained by optical absorption method. From the analysis of the rate equation, σ (V, J) is obtained, and the summation of J is obtained as (1.4 ± 0.6) × 10-16cm2 [vs v = 0] 0.5) × 10-16 cm 2 [for v = 1].