CO分子的A^1∏(v=1)对d^3Δ(v=5)态的微扰研究  

Study of perturbation of A^1∏(v=1) state with d^3Δ(v=5) state of CO

作　　者：王亚玲[1] 郭迎春[1] 

机构地区：[1]华东师范大学物理系精密光谱科学与技术国家重点实验室,上海200062

出　　处：《原子与分子物理学报》2008年第5期1170-1174,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金资助项目(10574045;60708003)

摘　　要：CO谱带的微扰给谱线的标识和分析带来挑战.这里针对COA1∏(v=1)对d3Δ(v=5)态的微扰,首先采用有效哈密顿矩阵的方法重新分析了d3Δ-a3∏(5,0)带高精度的涉及d3Δ2和d3Δ3的振转光谱数据,发现A1∏的微扰可忽略不计.进一步理论计算了由A1∏的微扰产生的d3Δ的Δ1,Δ2和Δ3的转动能级移动和d3Δ-a3∏(5,0)光谱强度的变化.发现Δ1的能级移动最大,最大可达4 cm-1,这个能级移动随J值的增大而减小;对Δ2和Δ3的影响在J小时可忽略不计.光谱强度的改变有类似的变化趋势,涉及到Δ1的d3Δ1-a3∏光谱强度减小量最大可达20%,随J的增大,此减小量变小;对涉及Δ2和Δ3的光谱强度此微扰可忽略不计,从而给出了上面实验数据分析中不考虑微扰的原因.Perturbations between bands add difficulty to identification and analysis of spectra of CO. This paper focus on the perturation between A^1Π （v=1） and d^3△ （v=5）. The high sensitive d^3△-a^3Π （5, 0） band experimental data involved d^3△2 and d^3△3 components are reanalyzed using effective Hamitonian method. The result shown that the perturbation of A^1Π （v=1） can be neglected. Further the energy shifts and spectral intensity changes of d^3△1,d^3△2 and d^3△3 due to A^1Π （v=1） perturbation are calculated theoretically. It is found that the energy shift for d^3△1 is significant and it is up to 4 cm^-1 for J=1. It decreases with increasing J. The energy shifts are very small with small J values for d^3△2 and d^3△3. Due to the perturbation of A^1Π, the spectral intensity of d^3△1-a^3Π changes smaller up to 20%.This change decreses with increasing J values. The changes relative to d^3△2 and d^3△3 are too small to be neglected. These account for the above mentioned fact that A^1Π （v=1） perturbation can be neglected in analysis of the data only relative to d^3△2 and d^3△3.

关 键 词：微扰 能级移动 光谱强度 有效哈密顿方法 

分 类 号：O561[理学—原子与分子物理]