Effect of isotope on state-to-state dynamics for reactive collision reactions O(3P)+H2^+→OH^++H and O(3P)+H2^+→OH+H^+ in ground state 1^2A" and first excited 1^2A' potential energy surfaces  

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作  者:Juan Zhao Ting Xu Lu-Lu Zhang Li-Fei Wang 赵娟;许婷;张路路;王立飞(School of Science,Shandong Jiaotong University,Jinan 250357,China;School of Physics and Electronics,Shandong Normal University,Jinan 250358,China)

机构地区:[1]School of Science,Shandong Jiaotong University,Jinan 250357,China [2]School of Physics and Electronics,Shandong Normal University,Jinan 250358,China

出  处:《Chinese Physics B》2020年第2期231-242,共12页中国物理B(英文版)

基  金:Project supported by the National Natural Science Foundation of China(Grant No.11504206);the Shandong Jiaotong University PhD Research Start-up Fund,China.

摘  要:We carry out quantum scattering dynamics and quasi-classical trajectory(QCT) calculations for the O+H2+ reactive collision in the ground(12 A").nd first excited(12 A’) potential energy surface.We calculate the reaction probabilities of O+H2+(v=0,j=0)→OH++H and O+H2+(v=0,j=0)→OH+H+reaction for total angular momentum J=0.The results calculated by QCT are consistent with those from quantum mechanical wave packet.Using the QCT method,we generate in the center-of-mass frame the product state-resolved integral cross-sections(ICSs);two commonly used generalized polarization-dependent differential cross-sections(PDDCS s),(2π/σ)(dσ00/dωt),(2π/σ)(dσ20/dωt));and three angular distributions of the product rotational vectors,p(θr),P(φr),and p(θr,φr).We discuss the influence on the scalar and vector properties of the potential energy surface,the collision energy,and the isotope mass.Since there are deep potential wells in these two potential energy surfaces,their kinetic characteristics are similar to each other and the isotopic effect is not obvious.However,the well depths and configurations of the two potential energy surfaces are different,so the effects of isotopic substitution on the integral cross-section and the rotational polarization of product are different.We carry out quantum scattering dynamics and quasi-classical trajectory(QCT)calculations for the O+H2+reactive collision in the ground(1^2A')and first excited(1^2A')potential energy surface.We calculate the reaction probabilities of O+H2^+(v=0,j=0)→OH^++H and O+H2^+(v=0,j=0)→OH+H^+reaction for total angular momentum J=0.The results calculated by QCT are consistent with those from quantum mechanical wave packet.Using the QCT method,we generate in the center-of-mass frame the product state-resolved integral cross-sections(ICSs);two commonly used generalized polarization-dependent differential cross-sections(PDDCSs),(2π/σ)(dσ00/dωt),(2π/σ)(dσ20/dωt);and three angular distributions of the product rotational vectors,P(θr),P(φr),and P(θr,φr).We discuss the influence on the scalar and vector properties of the potential energy surface,the collision energy,and the isotope mass.Since there are deep potential wells in these two potential energy surfaces,their kinetic characteristics are similar to each other and the isotopic effect is not obvious.However,the well depths and configurations of the two potential energy surfaces are different,so the effects of isotopic substitution on the integral cross-section and the rotational polarization of product are different.

关 键 词:quasi-classical trajectory state-to-state ISOTOPIC substitution rotational polarization of product 

分 类 号:O643.12[理学—物理化学]

 

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