共查询到18条相似文献,搜索用时 62 毫秒
1.
苗刚 《原子与分子物理学报》2010,27(1)
碰撞转动传能中存在量子干涉效应已经在静态池实验中被观测到,并且积分角也能被测量。但静态池掩盖了大量的实验信息,利用分子束实验可得到转动传能更准确的信息,进而得到影响干涉角的的具体因素。文中运用含时微扰的一级波恩近似理论和各向异性相互作用势,建立了原子-双原子分子(混合态)体系碰撞诱导转动能量传递中的量子干涉效应的理论模型,描述了观察和测量微分干涉角的方法,得到了微分干涉角与碰撞半径和碰撞速度间的关系,同时也得到了实验温度对微分干涉角的影响。此理论模型对于理解和进行分子束实验是非常重要的. 相似文献
2.
碰撞转动传能中存在量子干涉效应已经在静态池实验中被观测到,并且积分角也能被测量.利用分子束实验可得到转动传能更准确的信息,进而得到影响干涉角的的具体因素.文中利用一阶含时波恩近似和L-J相互作用势,建立了原子—双原子分子碰撞系统转动传能的量子干涉模型,描述了观察和测量微分干涉角的方法,得到了微分干涉角与碰撞半径和碰撞速度间的关系,同时也得到了积分干涉角和实验温度的关系.此理论模型对于理解和进行分子束实验是非常重要的. 相似文献
3.
分子内部转动传能的静态池实验观察到了碰撞量子干涉效应(CQI),并且测得积分干涉角,为了获得更加精确的分子内部转动传能的碰撞量子干涉效应信息,实验就必须要采用分子束实验进行.本文理论上采用各项异性相互作用势,应用含时微扰理论的一级波恩近似,假想在分子束实验的条件下,建立在原子—双原子分子体系中碰撞量子干涉的理论模型.理论上推导出微分干涉角具体表达式,通过计算定性地讨论了微分干涉角随着碰撞参数、速率等的变化趋势,同时初步探讨了实验的正确观测途径,得出了采用分子束进行实验观测的实验方法,为进一步进行分子束实验提供了理论基础,对实验的进行起到了一定的借鉴作用. 相似文献
4.
转动传能的量子干涉效应在静态池实验中发现,并且已测得积分干涉角.为了得到更多关于传能的准确信息,应利用分子束进行实验.本文基于一阶含时波恩近似,模拟了利用分子束实验进行量子干涉效应研究的理论模型.此模型采用了Lennard-Jones相互作用势和直线轨道近似.通过本文建立的模型,研究了影响干涉效应的微分干涉角的因素,并且得到了徽分干涉角和碰撞速度、碰撞参数及碰撞体的关系.此理论模型对于指导分子束实验具有重要的意义. 相似文献
5.
转动传能的量子干涉效应在静态池实验中发现,并且已测得积分干涉角.为了得到更多关于穿能的准确信息,应利用分之束进行实验.本文基于一阶含时波恩近似,模拟了利用分子束实验进行量子干涉效应研究的理论模型.此模型采用了Lennard-Jones 相互作用势和直线轨道近似.通过本文建立的模型,研究了影响干涉效应的微分干涉角的因素,并且得到了微分干涉角和碰撞速度、碰撞参数及碰撞伴间的关系.此理论模型对于对于指导分子束实验具有重要的意义. 相似文献
6.
王伟丽 《原子与分子物理学报》2012,29(3)
为了进一步理解原子双原子系统碰撞转动传能中的量子干涉效应,本文对NaH(b3Π~A1∑+)-He碰撞系统进行了理论计算.本文利用一阶含时波恩近似和L-J相互作用势,建立了原子-双原子分子碰撞系统转动传能的量子干涉模型.通过本文理论可得出影响碰撞系统积分干涉角的因素,同时也得到了积分干涉角和转动量子数间的关系.此理论模型对于理解和进行分子束实验是非常重要的. 相似文献
7.
王伟丽 《原子与分子物理学报》2012,29(6):463-468
为了进一步理解原子双原子系统碰撞转动传能中的量子干涉效应,本文对NaH —He碰撞系统进行了理论计算。本文利用一阶含时波恩近似和L-J相互作用势,建立了原子-双原子分子碰撞系统转动传能的量子干涉模型,通过本文理论可得出影响碰撞系统积分干涉角的因素,同时也得到了积分干涉角和转动量子数间的关系。此理论模型对于理解和进行分子束实验是非常重要的。 相似文献
8.
利用波恩近似理论对双原子激发态转动传能进行了剖析,更深入的研究了原子分子碰撞过程中量子干涉效应相关信息.利用各项异性相互作用势和直线轨迹近似建立了新的量子干涉模型,讨论了原子与双原子分子碰撞时散射角和微分干涉角的关系,得到了干涉角和各向异性参数及转动量子数的关系. 相似文献
9.
沙国河及其工作组于1995年发表了COA^1∏(v=0)~e^3∑^-(v=1)与He,Ne及其它碰撞伴的碰撞过程中转动传能的碰撞量子干涉现象,并得到了积分干涉角,陈等从理论和实验上发现了Na2(A^1∑u^+,v=8~b^3∏0u,v=14)体系与Na(3s)碰撞的碰撞量子干涉现象,孙等计算了其积分干涉角,但是对微分干涉角没有过多的计算.本文作为对原子-双原子体系碰撞诱导转动传能的进一步理论研究,在含时一级波恩近似的基础上考虑各向异性相互作用势和长程相互作用势,计算了单叁混合态的Na2(A^1∑u^+,v=8~b^3∏0u,v=14)体系与Na碰撞的微分干涉角,并得到了微分干涉角与碰撞参数的关系,此理论模型对理解和进行分子束实验是非常重要的. 相似文献
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11.
In order to study the collisional quantum interference (CQI) on rotational energy transfer in atom-diatom system, we have studied the relation of the integral interference angle and differential interference angle in Naq-Na2 (A1 ∑u^+,v=8-b^3∏0u,v=14) collision system. In this paper, based on the first-Born approximation of timedependent perturbation theory and taking into accounts the anisotropic effect of Lennard-Jones interaction potentials, we present a theoretical model of collisional quantum interference in intramolecular rotational energy transfer, and a relationship between differential and integral interference angles. 相似文献
12.
In our previous theoretical studies [Meng-Tao Sun, Yong-Qing Lee, and Feng-Cai Ma, Chem. Phys.Lett. 371 (2003) 342], we have reported the quantum interference on collision-induced rotational energy transfer on CO (A1П, v = 3) with inert gases, which originates from the difference between the two A-related collision potential energy surfaces. The interference angle, which measures the degree of coherence, is presented in this paper. Based on the time-dependent first order Born approximation, taking into account the anisotropic Lennard-Jones interaction potentials, the relation of the interference angle with the factors, including experimental temperature, partner, and rotational quantum number, are obtained. The changing tendencies with them are discussed. This theoretical model is important to understanding and performing this kind of experiment. 相似文献
13.
波长为157nm的 O2 在受激准分子激光器作用下可离解为 O3P 和 O1D .为了在理论上研究化学反应 的量子干涉效应,利用一阶含时波恩近似及各向异性相互作用势建立了量子干涉效应模型,讨论了完全干涉和完全非干涉两种情况。 相似文献
14.
Further Study of A-Related Quantum Interference of H-State Diatomic on Collision-Induced Rotational Energy Transfer 总被引:1,自引:0,他引:1
LI Yong-Qing SONG Peng CHEN Yue-Hui WANG Wei-Li MA Feng-Cai 《理论物理通讯》2005,44(2):347-352
In our previous theoretical studies [Meng-Tao Sun, Yong-Qing Lee, and Feng-Cai Ma, Chem. Phys.Left. 371 (2003) 342], we have reported the quantum interference on collision-induced rotational energy transfer on CO (A ^1 Π,v = 3) with inert gases, which originates from the difference between the two A-related collision potential energy surfaces. The interference angle, which measures the degree of coherence, is presented in this paper. Based on the time-dependent first order Born approximation, taking into account the anisotropic Lennard-Jones interaction potentials, the relation of the interference angle with the factors, including experimental temperature, partner, and rotational quantum number, are obtained. The changing tendencies with them are discussed. This theoretical model is important to understanding and performing this kind of experiment. 相似文献
15.
In order to study the collisional quantum interference (CQI) on rotational energy transfer in atom-diatom system, we have studied the relation of the integral interference angle and differential interference angle in Na+Na2 (A1Σ+u, v=8∽b3Π0u, v=14) collision system. In this paper, based on the first-Born approximation of time-dependent perturbation theory and takinginto accounts the anisotropic effect of Lennard-Jones interaction potentials,we present a theoretical model of collisional quantum interference inintramolecular rotational energy transfer, and a relationship betweendifferential and integral interference angles. 相似文献
16.
文章详细介绍了单三重混合态同核双原子分子Na2(A1∑+u,ν=8~b'3Ⅱ0u,ν=14)和Na碰撞传能的干涉相位角的理论计算方法.并且采用了两种不同的相互作用势(一种是长程吸引相互作用势,另一种是Lennard-Jones相互作用势),进行了具体的数值计算.在实验温度750 K下,计算积分干涉相位角,与实验值相差很小.干涉相位角的大小表明混合态体系碰撞传能中的量子干涉效应是不容忽视的.最后,分析了干涉相位角随着不同参数的变化关系,发现Na2 Na体系中,干涉相位角随各参数变化而变化,但变化不大. 相似文献
17.
LI Yong-Qing LI Jian MA Feng-Cai 《理论物理通讯》2006,46(8)
Collisional quantum interference (CQI) was observed in the intramolecular rotational energy transfer in the experiment of the static cell, and the integral interference angles were measured. To observe more precise information, the experiment in the molecular beam should be taken, from which the relationship between the differential interference angle and the scattering angle can be obtained. In this paper, the theoretical model of CQI is described in an atom-diatom system in the condition of the molecular beam, based on the first-Born approximation of time-dependent perturbation theory, taking into accounts the long-range interaction potential. The method of observing and measuring correctly the differential interference angle is presented. The changing tendency of the differential interference angle with the impact parameter and relative velocity is discussed. The changing tendencies of the differential interference angle with the parameter of experiment in the molecular beam, including the impact parameter and the velocity are discussed. This theoretical model is important to understand or perform the experiment in the molecular beam. 相似文献
18.
LI Yong-Qing LI Jian MA Feng-Cai 《理论物理通讯》2006,46(2):294-296
Collisional quantum interference (CQI) was observed in the intramolecular rotational energy transfer in the experiment of the static cell, and the integral interference angles were measured. To observe more precise information, the experiment in the molecular beam should be taken,from which the relationship between the differential interference angle and the scattering angle can be obtained. In this paper, the theoretical model of CQI is described in an atom-diatom system in the condition of the molecular beam, based on the first-Born approximation of time-dependent perturbation theory, taking into accounts the long-range interaction potential. The method of observing and measuring correctly the differential interference angle is presented. The changing tendency of the differential interference angle with the impact parameter and relative velocity is discussed. The changing tendencies of the differential interference angle with the parameter of experiment in the molecular beam, including the impact parameter and the velocity are discussed. This theoretical model is important to understand or perform the experiment in the molecular beam. 相似文献