物理化学学报 >> 1987, Vol. 3 >> Issue (02): 162-169.doi: 10.3866/PKU.WHXB19870210

研究论文 上一篇    下一篇

用激光诱导荧光方法研究Ca+NF3, CHF3反应的初始产物能态分布

王珏; 徐大力; 何国钟; 楼南泉   

  1. 中国科学院大连化学物理研究所
  • 收稿日期:1985-11-20 修回日期:1986-04-27 发布日期:1987-04-15

LASER-INDUCED FLUORESCENT STUDY OF NASCENT STATE DISTRIBUTION OF THE PRODUCTS FOR Ca+NF3, CHF3 REACTIONS

Wang Jue; Xu Dali; He Guozhong; Lou Nanquan   

  1. Dalia Institute of Chemical Physics; Academia Sinica
  • Received:1985-11-20 Revised:1986-04-27 Published:1987-04-15

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摘要： 本文使用LIF方法在气-束装置上研究了Ca+NF_3——CaF+F_2N 和Ca+CHF_3——CaF+CHF_2二个反应的初始产物能态分布。通过测得的CaF分子的LIF激发光谱和计算机模拟计算, 发现二个反应的CaF振动分布属于类Boltzmann型, 并取得其内能分配的信息。通过光谱模拟和信息论计算, 还获知NF_2和CHF_2自由基的内能态是激发的。根据分析, 本文认为这二个反应是具有后期释能特征的直接碰撞反应。

Abstract: The state population distributions of the nascent products for Ca+NF_3→CaF+ NF_2 and Ca+CHF_3→-CaF+CHF_2 reactions were studied by means of LIF in a beam- gas arrangement. From the LIF spectra of CaF and the computer simulations, the CaF vibrational distributions for both reactions were found to be similar to the Boltzmann distribution and the internal energy disposal of CaF was determined quantitatively.The results of the spectral simulation and the information theory computation indicate that NF_2 and CHF_2 radicals were vibrationally and rotationally excited. These two reactions are thought to be direct collision reactions with the “late” exoergicity on potential surface.