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Observation of a New 2§ Excited Electronic State of SF by Resonance-Enhanced Multiphoton Ionization Spectroscopy
Xian-feng Zheng,Ting-ting Wang,Chun-yan Li,Yang Chen*,Jing-song Zhang
Author NameAffiliationE-mail
Xian-feng Zheng Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics University of Science and Technology of China, Hefei 230026, ChinaDepartment of Physics, Anhui Normal University, Wuhu 241000, China  
Ting-ting Wang Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics University of Science and Technology of China, Hefei 230026, China  
Chun-yan Li Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics University of Science and Technology of China, Hefei 230026, China  
Yang Chen* Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics University of Science and Technology of China, Hefei 230026, China yangchen@ustc.edu.cn 
Jing-song Zhang Department of Chemistry, University of California at Riverside, Riverside 92521, USA  
Abstract:
The (2+1) resonance-enhanced multiphoton ionization (REMPI) spectrum of SF has been obtained in the single-photon wavelength region of 307-321 nm. Five vibronic bands were observed and assigned to the two-photon transitions from the ground state to a 2§ Rydberg state. The term value Te, vibrational frequency, and the rotational constant of the 2§ Rydberg state were determined. Another 2P state was observed near 312 nm.
Key words:  SF radical, Resonance-enhanced multiphoton ionization, Spectroscopy
FundProject:
SF自由基的REMPI光谱:观测到一个新的2§电子态
郑贤峰,王婷婷,李春燕,陈旸*,张劲松
摘要:
利用SF6/Ar混合气沿气束方向放电, 产生SF自由基.在306?321 nm范围内扫描激光波长得到SF自由基(2+1) REMPI光谱. 观测到2§?X2|双光子跃迁的5 个振转谱带, 通过对实验谱分析获得新观测到2§里德堡态的转动常数近似值和振动频率约815 cm?1;同时对2|3=2?X2|3=2跃迁谱带进行了转动分析,转动常数B0v?0.42 cm?1,该谱带对应着(1+2) REMPI机理;对SF自由基电离解离机理也进行了讨论.
关键词:  SF自由基,共振增强多光子电离,光谱
DOI:10.1088/1674-0068/20/04/372-376
分类号: