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Predissociation of the b3Πg(v=9) State of He2 Excimer
Chuan-liang Li,Chuan-liang Li,Jun-li Zhang,Xiao-hua Yang,Yang-qin Chen*
Author NameAffiliationE-mail
Chuan-liang Li State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal Univer-sity, Shanghai 200062, China  
Chuan-liang Li State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal Univer-sity, Shanghai 200062, China  
Jun-li Zhang State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal Univer-sity, Shanghai 200062, China  
Xiao-hua Yang State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal Univer-sity, Shanghai 200062, ChinaSchool of Science, Nantong University, Nantong 226007, China  
Yang-qin Chen* State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal Univer-sity, Shanghai 200062, China yqchen@phy.ecnu.edu.cn 
Abstract:
The predissociation of the v=9 level in the b3Πg state by the c3g+ state of helium eximer(He2) was studied based on the newly observed (9, 3) band in the b3Πg-a3u+ system inthe region of 12065~12445 cm-1 employing optical heterodyne-concentration modulation absorption spectroscopy. With the help of the previous potential energy curves and molecular constants of He2, the corresponding predissociation mechanism for the b3Πg (v=9) state was analyzed. An RKR potential energy curve of b3Πg and an ab initio potential curve of c3g+ were used to calculate the predissociation linewidths that show basic agreement withobservations, which can quantitatively explain the experiments.
Key words:  Helium eximer, Predissociation, Concentration modulation absorption spec-troscopy
FundProject:
He2分子 b3Πg(v=9)态的预解离
李传亮,邓伦华,张俊丽,杨晓华,陈扬骎*
摘要:
利用光外差-浓度调制吸收光谱技术测量了b3Πg~a3u+(9,3)带在12065~12445 cm-1的光谱,并研究了He2分子b3Πg(v=9)态与c3g+ 态的预解离相互作用.基于He2分子c3g+ 态的ab initio理论计算势能曲线和b3Πg态的RKR势能曲线,分析了b3Πg(v=9)态的预解离机制,并计算了b3Πg(v=9)态转动能级的预解离线宽,计算结果同实验测量基本一致.
关键词:  He准分子,预解离,浓度调制光谱
DOI:10.1088/1674-0068/24/02/125-128
分类号: