【摘要】 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。更多还原

【Abstract】 Optical heterodyne magnetic rotation enhanced concentration modulation spectroscopy which is a high sensitive spectroscopic technique for detection of transient and excited molecules, is employed to directly observe the rovibronic absorption spectrum of CO (d3Δ←a3Π) in the regions of 16400～16500 cm -1 and 17450～17750 cm -1 respectively. The (4,0) and (5,0) bands of CO triplet system were observed and analyzed by taking account of the perturbation interaction between the d3Δ 1 (v=4),d3Δ 2 (v=4) states and A1Π(v=0),D1Δ (v=0) states, respectively, d3Δ 1 (v=5) and A1Π (v=1) states as well. A set of precise rotational molecular constants for the d3Δ (v=4,5) have been determined.更多还原