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Li(2P)+H_2→LiH+H反应转动分辨截面的测定 被引量：1

Experimental Evaluation of Rotationally Resolved Cross-sections for the Li(2P)+H_2→LiH+H Reaction
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摘要 利用光学吸收技术,测定了Li(2P)+H→LiH+H的反应截面.仅在LiH基态的ν=0能级才发现有布居.通过吸收谱的测量,确定LiH(0,J)的转动态分布.由速率方程分析得到反应截面σ(J),总的反应截面为所有σ(J)之和,结果是(0.4±0.19)×10-16cm2.LiH(0,J)的分布接近统计分布,转动线吸收强度除以2J+1的对数与J(J+1)成线性关系,由斜率给出转动温度为(1529±0.05)K.观察结果给出了以下的结论:直线反应碰撞机制不适用于Li+H2系统,而插入式的反应机制适用于该系统. Rotationally resolved total cross sections of theLi（2P）＋H-LiH＋H reaction have been investigated using absorption technique. LiH was found in the v = 0 state. Absorption signals were converted to nascent LiH populations using saturation absorption .Using a rate equation model ,we obtain reaction cross sections σ（J） ,The total cross section is obtained by summing the individual cross sections σ（J）. It is （0.4±0.19）×10^-16cm^2.The rotational distributions are close to statistical ones. A plot of the logarithm of the relative absorption intensities of states divided by the degeneracy factor 2J＋ 1 against J（J＋1） was yielded. The linearity of the plot establishes the Boltzmann form for the rotational distributions. The rotational temperature is （1529 ± 0.05）K. The observation provides indirect evidence that the collinear collision geometry by the harpoon mechanism is not applicable to this system. The insertion mechanism in C2v collision geometry is favored.
作者 王雪燕 王大贵 周冬冬 穆尼赛 戴康 沈异凡
机构地区 新疆大学物理科学与技术学院
出处 《新疆大学学报（自然科学版）》 CAS 2010年第4期461-464,共4页 Journal of Xinjiang University(Natural Science Edition)
基金 国家自然科学基金资助项目(10664003)
关键词 激光化学 反应碰撞截面 吸收技术 布居分布 Li-H2 Laser chemistry cross section of reactive collision absorption technique population distribution Li-H2
分类号 O561.5 [理学—原子与分子物理] O644.1 [理学—物理化学]
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参考文献8

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同被引文献14

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引证文献1

新疆大学学报（自然科学版）
2010年 第4期

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