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Chin. Phys. B, 2015, Vol. 24(11): 113402    DOI: 10.1088/1674-1056/24/11/113402
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Vector correlations study of the reaction N(2D)+ H2(X1Σg+)→NH(a1Δ)+ H(2S) with different collision energies and reagent vibration excitations

Li Yong-Qinga b, Zhang Yong-Jiaa, Zhao Jin-Fenga b, Zhao Mei-Yuc, Ding Yonga
a Department of Physics, Liaoning University, Shenyang 110036, China;
b State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
c Institute of Theoretical Simulation Chemistry, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China
Abstract  Vector correlations of the reaction N(2D)+ H2(X1Σg+)→NH(a1Δ)+ H(2S)are studied based on a recent DMBESEC PES for the first excited state of NH2 [J. Phys. Chem. A 114 9644 (2010)] by using a quasi-classical trajectory method. The effects of collision energy and the reagent initial vibrational excitation on cross section and product polarization are investigated for v = 0–5 and j = 0 states in a wide collision energy range (10–50 kcal/mol). The integral cross section could be increased by H2 vibration excitation remarkably based on the DMBE-SEC PES. The different phenomena of differential cross sections with different collision energies and reagent vibration excitations are explained. Particularly, the NH molecules are scattered mainly in the backward hemisphere at low vibration quantum number and evolve from backward to forward direction with increasing vibration quantum number, which could be explained by the fact that the vibrational excitation enlarges the H–H distance in the entrance channel, thus enhancing the probability of collision between N atom and H atom. A further study on product polarization demonstrates that the collision energy and vibrational excitation of the reagent remarkably influence the distributions of P(θr), P(φr), and P(θr,φr).
Keywords:  vector correlations      vibrational excitation      differential cross section      stereodynamics      rotational polarization  
Received:  20 April 2015      Revised:  18 June 2015      Accepted manuscript online: 
PACS:  34.50.Lf (Chemical reactions)  
  34.50.-s (Scattering of atoms and molecules)  
  31.15.xv (Molecular dynamics and other numerical methods)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11474141 and11404080), the Special Fund Based Research New Technology of Methanol conversion and Coal Instead of Oil, the China Postdoctoral Science Foundation (Grant No. 2014M550158), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China (Grant No. 2014-1685), and the Program for Liaoning Excellent Talents in University, China (Grant Nos. LJQ2015040 and LJQ2014001).
Corresponding Authors:  Li Yong-Qing, Zhao Mei-Yu, Ding Yong     E-mail:  yqli@lnu.edu.cn;myzhao@hit.edu.cn;yongding@lnu.edu.cn

Cite this article: 

Li Yong-Qing, Zhang Yong-Jia, Zhao Jin-Feng, Zhao Mei-Yu, Ding Yong Vector correlations study of the reaction N(2D)+ H2(X1Σg+)→NH(a1Δ)+ H(2S) with different collision energies and reagent vibration excitations 2015 Chin. Phys. B 24 113402

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