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New Observation of Na2 43Σ+g State by Pulsed Perturbation Facilitated Optical-Optical Double Resonance Spectroscopy
Zheng Chen1, Cheng-zhe Cui1, Yao-ming Liu1, Li Li*1, V. B. Sovkov2, V. S. Ivanov2
1.Department of Physics and Key Laboratory of Atomic and Molecular Nanosciences, Tsinghua University, Beijing 100084, China;2.V. A. Fock Institute of Physics, St.Pertersburg State University,Petrodvorets, St. Petersburg 198504, Russia
Abstract:
Sixty-five new vibronic levels of the Na2 43Σ+g state have been observed in the 33900-35200 cm-1 energy region above the potential minimum of the ground state by pulsed perturbation facilitated optical-optical double resonance (PFOODR) fluorescence excitation spectroscopy. These new data fill the gap between the low-v levels mainly observed by continuous wave (CW) PFOODR spectroscopy and the high-v levels above the 3s+3d limit observed by pulsed PFOODR with predissociation detection. Molecular constants are fitted below potential shelf around the 3s+3d atomic limit with previously published data (mainly observed by CW PFOODR) and these new data. RKR potential curve has been calculated with the new constants. The constants are: Te = 32127:090 cm-1, we = 121:4099(0:20720) cm-1, Be = 0:116287(0:0002300) cm-1, Re =3:551 ?. An error of the RKR potential curve of J. Chem. Phys. 108, 7707 (1998) is corrected.
Key words:  Triplet states, PFOODR, 43Σ+g state, 43Σ+g state, Rydberg states
FundProject:
脉冲激光微扰增强双共振光谱对钠分子43∑g+态的新实验观测
陈峥1, 崔成哲1, 刘耀明1, 李丽* 1, V.B.索夫科夫2, V.S.依万诺夫2
1.清华大学物理系,原子分子纳米科学重点实验室,北京100084;2.俄罗斯圣彼得堡大学物理所,圣彼得堡
摘要:
用微扰增强双共振对钠分子43∑g+态33900~35200 cm-1的65个振转能级进行了实验观测.以往用连续激光双共振方法只看到低振动能级,用脉冲激光双共振和检测解离产物的方法只观测到高振动能级.获得的新数据填补了以往数据的空缺.综合v=0~31能级所有数据,拟合出一套分子常数,计算出RKR势能曲线.主要分子常数为:Te=32127.090 cm-1,ωe=121.1099(0.20720)cm-1,Be=0.116287(0.0002300)cm-1,Re=3.551 A.还对J.Chem.Phys.108,7707(1998)中RKR势能曲线的一个错误进行了纠正.
关键词:  Na2  三线态  PFOODR  43∑g+态  33∑g+态  Rydberg态
DOI:10.1360/cjcp2006.19(1).11.4
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