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Optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy was employed to observe the visible absorption spectra of the B^2Σ^+_u-X^2Σ^+_g electronic transition of C^-_2. Four hot bands (0,1), (1,2), (2,3) and (3,4) have been observed and the band (3,4) is measured directly for the first time, so far as we know, by absorption. A rotational analysis was carried out to obtain molecular constants. With the Franck-Condon principle and the vibrational Boltzmann distribution, we have estimated the vibrational temperature of C^-_2 to be about 3000K.  相似文献   
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CO三重带系d^3Δ-α^3∏(4,0)和(5,0)带激光光谱研究   总被引:1,自引:0,他引:1  
光外差磁旋转浓度调制激光光谱技术属于一种高灵敏度的吸收光谱测量方法,可以用于瞬态分子和激发态分子光谱的检测。采用这种技术分别在16400~16650cm^-1和17450~17750cm^-1波段内直接观测到CO三重带系d^3△←α^3∏(4,0)(5,0)振转吸收光谱。这种跃迁的上态d^3△1(v=4),d^3△2(v=4),d^3△1(v=5)分别与A^1∏(v=0),D^1△(v=0)和A^1∏(v=1)态存在微扰相互作用。通过对所测量到的CO三重带系(4,0)(5,0)振转谱带作了包含微扰相互作用在内的分析,获得了上态d^3△(v=4,5)的精确的分子转动光谱常数。  相似文献   
3.
光外差磁旋转浓度调制激光光谱技术属于一种高灵敏度的吸收光谱测量方法 ,可以用于瞬态分子和激发态分子光谱的检测。采用这种技术分别在 16 4 0 0~ 16 6 5 0cm-1和 174 5 0~ 1775 0cm-1波段内直接观测到CO三重带系d3 Δ←a3 Π(4,0 ) (5 ,0 )振转吸收光谱。这种跃迁的上态d3 Δ1(v =4 ) ,d3 Δ2 (v =4 ) ,d3 Δ1(v =5 )分别与A1Π(v =0 ) ,D1Δ(v =0 )和A1Π(v =1)态存在微扰相互作用。通过对所测量到的 CO三重带系 (4,0 ) (5 ,0 )振转谱带作了包含微扰相互作用在内的分析 ,获得了上态d3 Δ(v =4 ,5 )的精确的分子转动光谱常数。  相似文献   
4.
Optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy was employed to observe the visible absorption spectra of the B^2∑u^ -X^2∑g^ electronic transition of C2^-. Four hot bands (0,1), (1,2), (2,3) and (3,4) have been observed and the band (3,4) is measured directly for the first time, so far as we know, by absorption. A rotational analysis was carried out to obtain molecular constants. With the Franck-Condon principle and the vibrational Boltzmann distribution, we have estimated the vibrational temperature of C2^- to be about 3000K.  相似文献   
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