光谱学与光谱分析 |
|
|
|
|
|
Rotational and Vibrational State Distributions of CsH in the Reactions of Cs(6 2D5/2) with H2 |
WANG Da-gui,ZHOU Dong-dong, WANG Xue-yan, MU Ni-sai, DAI Kang, SHEN Yi-fan* |
College of Physics and Technology, Xinjiang University, Urumqi 830046, China |
|
|
Abstract The nascent quantum state distributions of the CsH product resulting from the reaction Cs(6D5/2) with H2 were determined using a laser pump-probe technique in a five-arm crossed heat-pipe oven. Cs-H2 mixture was irradiated with pulses of 885.4 nm radiation from a OPO laser, populating 6D5/2 state by two-photon absosption. Laser induced fluorescence was used to detect CsH molecules directly at the collision volume by scanning pulse tunable dye laser over X 1Σ+(v″,J″)→A 1Σ+(v′,J′=J″±1) absorption line. The vibration bands (v″=0, v′=6) and (v″=1, v′=9) were chosen. For the investigated reaction, the nascent CsH product molecules were found to populate the lowest two vibrational (v″=0, 1) levels of the ground electronic state but could not be detected in any higher vibrational state. Rotational distributions of CsH products obtained for v″=0 and 1 states appear to be monomodal , peaking in J=6-8. The rotational population profile is roughly consistent with a statistical distribution at the system temperature. A plot of logarithm of relative population of states J divided by the degeneracy factor (2J+1) against J(J+1) was yielded. The linearity of the plot establishes the Boltzmann form for rotational distributions of both the v″=0 and 1. The rotational temperatures are (458±20) K and (447±18) K for v=0 and 1, respectively. The nascent CsH rotational temperatures were found to be slightly below the cell temperature. The relative vibrational population was determined to be 0.527 and 0.473. The average vibrational and rotational energy release can be computed. The relative fractions 〈fV〉, 〈fR〉 and 〈fT〉 of average energy disposal were derived as 0.25, 0.10 and 0.65 respectively, having a major translation energy release. All of the above results support the assumption that the Cs(6 2D5/2)-H2 reaction occurs primarily in a collinear geometry by a harpoon mechanism but not an insertion.
|
Received: 2009-05-25
Accepted: 2009-09-09
|
|
Corresponding Authors:
SHEN Yi-fan
E-mail: shenyifan01@xju.edu.cn
|
|
[1] Chang Y P, Hsiao M K, Liu D K, et al. J. Chem. Phys., 2008, 128: 234309. [2] Lin K C,Vetter R, Int. Rev. Phys. Chem., 2002, 21: 357. [3] Huang X, Zhao J Z, Xing G Q, et al. J. Chem. Phys., 1996, 104(4): 1338. [4] Mgers E G, Murnick D E, Softky W R. Appl. Phys., 1987, B43: 247. [5] Fan L H, Chen J J, Lin Y Y, et al. J. Phys. Chem., 1999, A103: 1300. [6] WAN Hong-fei, ZHANG Yan-wen, CUI Xiu-hua, et al(万鸿飞,张岩文,崔秀花,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2009,29(8):2042. [7] Cavero V, L′Hermite J-M, Rahmat G, et al. J. Chem. Phys., 1999, 110(07): 3428. [8] Lin D K, Lin K C. J. Chem. Phys., 1996, 105(20): 9121. [9] Chen J J, Huang Y M, Lin D K, et al. J Phys. Chem., 2001, 114(21): 9395. [10] L′Hermite J-M, Rahmat G, Vetter R. J. Chem. Phys., 1991, 95(5): 3347. [11] Visticot J P, Ferray M, Loyingot J, et al. J. Chem. Phys., 1983, 79(6): 2839. [12] Wong T H, Kleiber P D, Yang K H. J. Chem. Phys., 1999, 110(14): 6743.
|
[1] |
QI Guo-min1, TONG Shi-qian1, LIN Xu-cong1, 2*. Specific Identification of Microcystin-LR by Aptamer-Functionalized Magnetic Nanoprobe With Laser-Induced Fluorescence[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3813-3819. |
[2] |
KONG De-ming1, LIU Ya-ru1, DU Ya-xin2, CUI Yao-yao2. Oil Film Thickness Detection Based on IRF-IVSO Wavelength Optimization Combined With LIF Technology[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(09): 2811-2817. |
[3] |
WANG Shu-ying*, YOU De-chang, MA Wen-jia, YANG Ruo-fan, ZHANG Yang-zhi, YU Zi-lei, ZHAO Xiao-fang, SHEN Yi-fan. Experimental Collisional Energy Transfer Distributions for Collisions of CO2 With Highly Vibrationally Excited Na2[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(06): 1760-1764. |
[4] |
YUAN Li1, KONG De-ming2*, CHEN Ji-liang3, ZHONG Mei-yu3, ZHANG Xiao-dan3, XIE Bei-bei3, KONG Ling-fu3. Study on an Equivalent Estimation Method of Oil Spill of Water in Oil
Emulsion[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(02): 342-347. |
[5] |
ZHANG Xiao-dan1, KONG De-ming2*, ZHONG Mei-yu1, MA Qin-yong1, KONG Ling-fu1. Research on an Equivalent Evaluation Algorithm for the Oil Spill Volume of Oil-in-Water Emulsion on the Sea Surface[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(12): 3665-3671. |
[6] |
YAN Peng-cheng1, 2, ZHANG Xiao-fei2*, SHANG Song-hang2, ZHANG Chao-yin2. Research on Mine Water Inrush Identification Based on LIF and
LSTM Neural Network[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(10): 3091-3096. |
[7] |
CHEN Si-ying1, JIA Yi-wen1, JIANG Yu-rong1*, CHEN He1, YANG Wen-hui2, LUO Yu-peng1, LI Zhong-shi1, ZHANG Yin-chao1, GUO Pan1. Classification and Recognition of Adulterated Manuka Honey by
Multi-Wavelength Laser-Induced Fluorescence[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(09): 2807-2812. |
[8] |
YUAN Li1, XIE Bei-bei2, CUI Yong-qiang2, ZHANG Xiao-dan2, JIAO Hui-hui2. Research on Oil Spill Status Recognition Based on LIF[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(07): 2018-2024. |
[9] |
YAN Peng-cheng1, 2, ZHANG Chao-yin2*, SUN Quan-sheng2, SHANG Song-hang2, YIN Ni-ni1, ZHANG Xiao-fei2. LIF Technology and ELM Algorithm Power Transformer Fault Diagnosis Research[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(05): 1459-1464. |
[10] |
WU Jie1, LI Chuang-kai1, CHEN Wen-jun1, HUANG Yan-xin1, ZHAO Nan1, LI Jia-ming1, 2*, YANG Huan3, LI Xiang-you4, LÜ Qi-tao3,5, ZHANG Qing-mao1,2,5. Multiple Liner Regression for Improving the Accuracy of Laser-Induced Breakdown Spectroscopy Assisted With Laser-Induced Fluorescence (LIBS-LIF)[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(03): 795-801. |
[11] |
LI Jun1, 4, KONG De-ming2*, ZHANG Xiao-dan1, MA Qin-yong1, KONG De-han3, KONG Ling-fu1. Simulation Research on Detection of Emulsified Oil Spill on Sea Surface Based on LIF System With Coaxial Transceiver[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(02): 592-597. |
[12] |
CUI Yong-qiang1, KONG De-ming2*, MA Qin-yong1, XIE Bei-bei1, ZHANG Xiao-dan1, KONG De-han3, KONG Ling-fu1. Algorithm Research on Inversion Thickness of Oil Spill on the Sea Surface Using Raman Scattering and Fluorescence Signal[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(01): 104-109. |
[13] |
ZHANG Xiao-dan1, KONG De-ming2*, YUAN Li1, KONG De-han3, KONG Ling-fu1. BRRDF Simulation Research on Multiple Detection Parameters of Water-in-Oil Emulsion of Oil Spill on the Sea Surface[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(12): 3797-3801. |
[14] |
LIU Yu1, LI Zeng-wei2, DENG Zhi-peng1, ZHANG Qing-xian1*, ZOU Li-kou2*. Fast Detection of Foodborne Pathogenic Bacteria by Laser-Induced Fluorescence Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(09): 2817-2822. |
[15] |
WANG Yi-hui1, 2, HU Ren-zhi2*, XIE Pin-hua2, 3, 4*, WANG Feng-yang1, 2, ZHANG Guo-xian1, 2, LIN Chuan1, 2, LIU Xiao-yan5, WANG Yue2. The Study of Turbulent Calibration System of HOx Radical Detection[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(08): 2384-2390. |
|
|
|
|