Rovibrational energy transfer in collisions of H2 with D2: a full-dimensional wave packet propagation study

Rovibrational energy transfer in collisions of H2 with D2: a full-dimensional wave packet propagation study
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H2 与 D2 碰撞时的旋转振动能量转移:全维波包传播研究

DOI:
10.1080/00268976.2012.667165
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发表时间:
2012
期刊:
影响因子:
1.7
通讯作者:
H.-D. Meyer
H.-D. Meyer
中科院分区:
化学4区
文献类型:
--
作者:
F. Otto;F. Gatti;H.-D. Meyer

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本文用全维量子动力学方法计算了H2和D2分子碰撞中的振转能量转移过程,即H2(ν = 1)+ D2(ν = 0)→ H2(ν = 0)+ D2(ν = 1).旋转解决的状态到状态的横截面获得的碰撞能量高达0.5 eV。从这些,我们计算旋转平均的热速率系数的温度范围从100至500 K,并与现有的实验数据进行比较。对于某些过渡,我们发现它的数值计算的反向碰撞过程的横截面,然后使用微观可逆性,以获得最初寻求的横截面是有利的。我们采用多组态时间相关Hartree(MCTDH)方法传播波包,并计算截面的跃迁概率由Tannor和Weeks介绍的相关函数形式主义。计算是用势能面进行的,势能面是基于Boothroydet等人的六维表面,但减少了各向异性,如Pogrebnya和Clary所建议的。在内部曲线坐标的动能算子的表达式允许我们处理的运动学系统准确,没有任何解耦近似。
We present full-dimensional quantum dynamics calculations for the process of rovibrational energy transfer in collisions between H2and D2molecules, specifically H2(ν = 1) + D2(ν = 0) → H2(ν = 0) + D2(ν = 1). Rotationally resolved state-to-state cross-sections are obtained for collision energies up to 0.5 eV. From these we calculate rotationally averaged thermal rate coefficients in the temperature range from 100 to 500 K, and compare them with available experimental data. For some transitions, we found it numerically advantageous to compute cross-sections of the reverse collision process and then use microscopic reversibility to obtain the originally sought cross-sections. We employ the Multi-Configuration Time-Dependent Hartree (MCTDH) method for propagating wave packets, and calculate the cross-sections from transition probabilities obtained by the correlation function formalism introduced by Tannor and Weeks. Computations are performed with a potential energy surface that is based on the six-dimensional surface from Boothroydet al.but reduced in anisotropy, as suggested by Pogrebnya and Clary. The expression of the kinetic energy operator in terms of internal curvilinear coordinates allows us to treat the kinematics of the system exactly, without any decoupling approximations.
DOI: 10.1063/1.3511699
发表时间: 2011-01
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量子动力学中的离散变量表示
DOI: 10.1007/978-1-4899-2326-4_14
发表时间: 1992
期刊: The European Physical Journal D
影响因子: --
作者:
J. Light
通讯作者: J. Light
勘误表:“根据第一原理得出的准确的 H2-H2 相互作用势”[J. Phys. 112, 4465 (2000)]
DOI: --
发表时间: 2000
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