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题名: Energy-Transfer Kinetics Driven by Midinfrared Amplified Spontaneous Emission after Two-Photon Excitation from Xe (s(0)) to the Xe (6p[1/2](0)) State
作者: He, Shan1, 2;  Guan, Yafu2, 3;  Liu, Dong1, 2;  Xia, Xusheng1, 2;  Gai, Baodong1, 2;  Hu, Shu1;  Guo, Jingwei1;  Sang, Fengting1;  Jin, Yuqi1
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2017-05-11
DOI: 10.1021/acs.jpca.7b01905
卷: 121, 页:3430-3436
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: In optically pumped laser systems, rare gas lasers (RGLs) are a field of great interest for researchers. Gas laser regimes with metastable Ne, Ar, and Kr atoms have been investigated, while studies of RGLs based on metastable Xe are sparse. In this work, when a strong excitation laser (2.92 mJ/pulse, 7.44 X 10(5) W/cm(2)) was applied to excite Xe atoms from the ground state to the 6p[1/2](0) state, an interesting phenomenon emerged: An intense fluorescence of 980 nm (6p[1/2](1)-6s[3/2](2)) was produced. However, when the energy of excitation laser was decreased to 0.50 mJ/pulse (1.27 X 10(5) W/cm(2)), the fluorescence of 980 nm became very weak. Besides, lifetime and decay rate constant of the 6p[1/2](0) state under the condition of E = 2.92 mJ are significantly different from either those measured by other groups or those of E = 0.50 mJ These phenomena indicate that the high energy of excitation laser should trigger some new kinetic mechanisms. Further works identified that the new'kinetic mechanism is the MIR ASE of 3408 nm (6p[1/2](0)-6s'[1/2](1)). The mechanisms are proposed as follows. Substantial 6p[1/2](0) atoms are produced by laser excitation. Then, the ASE of 3408 nm (6p[1/2](0) 6s' [1/2](1)) is quickly produced to populate substantial 6s'[1/2](1) atoms. The 6s'[1/2](1) atoms can readily arrive at the 6p[1/2](1) states through collision by virtue of the small energy difference (84 cm ') and high collision rate constant of the transition from the 6s'[1/2](1) state to the 6p[1/2](1) state. As a result, the intense fluorescence of 980 nm is generated.
关键词[WOS]: DEACTIVATION RATE CONSTANTS ;  QUENCHING RATE CONSTANTS ;  RARE-GAS LASERS ;  XENON 5P5 6P ;  COLLISIONAL DEACTIVATION ;  RADIATIVE LIFETIMES ;  XE(6P) STATES ;  AR ;  ATOMS ;  VAPOR
语种: 英语
WOS记录号: WOS:000401402800010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152284
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Chem Lasers, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
He, Shan,Guan, Yafu,Liu, Dong,et al. Energy-Transfer Kinetics Driven by Midinfrared Amplified Spontaneous Emission after Two-Photon Excitation from Xe (s(0)) to the Xe (6p[1/2](0)) State[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2017,121:3430-3436.
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