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Observation of a New 2§ Excited Electronic State of SF by Resonance-Enhanced Multiphoton Ionization Spectroscopy
Xian-feng Zheng1,2, Ting-ting Wang1, Chun-yan Li1, Yang Chen*1, Jing-song Zhang3
1.Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics University of Science and Technology of China, Hefei 230026, China;2.Department of Physics, Anhui Normal University, Wuhu 241000, China;3.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1,2, 王婷婷1, 李春燕1, 陈旸*1, 张劲松3
1.合肥微尺度物质科学国家实验室,中国科学技术大学化学物理系,合肥230026;2.安徽师范大学物理系,芜湖241000;3.美国加州大学河滨分校化学系,河滨92521
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: