Two- and three-body collision coefficients for Xe( 3 P 1 ) and Xe( 3 P 2 ) atoms and radiative lifetime of the Xe 2 (1 u ) molecule
Two- and three-body collision coefficients for Xe( 3 P 1 ) and Xe( 3 P 2 ) atoms and radiative lifetime of the Xe 2 (1 u ) molecule
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Xe( 3 P 1 ) 和 Xe( 3 P 2 ) 原子的二体和三体碰撞系数以及 Xe 2 (1 u ) 分子的辐射寿命
DOI：
10.1103/physreva.13.1787
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发表时间：
1976
影响因子：
2.9
通讯作者：
M. Thieneman
中科院分区：
文献类型：
--
作者：
P. Leichner;K. F. Palmer;J. D. Cook;M. Thieneman
在4-1000Torr压力范围内研究了氙气真空紫外光发射的时间依赖关系。原子的激发是由低强度电子束提供的。在共振线、1500-AA(第一)连续体和1700-AA(第二)连续体的波长上进行了测量。测定了{Xe}(^{3}P1})原子破坏的二体和三体碰撞系数以及亚稳态的三体系数。在第二连续谱的波长下测得{1}{u}$分子态的辐射寿命为99毫微秒。三个波长的衰变常数与压力的关系导致如下结果：从{mathm{xe}(^{3}P1})$到$\mathm{xe}(^{3}P2})$的碰撞去激发率为${9.1\ifmmode\times\else\texttimes\fi{}10}^{3}$${\mathm{Sec}}^{\susuremathm{-}1}$/Torr。原子{xE}(^{3}P_{1})的三体系数为46${\mathrm{sec}}^{\ensuremath{-}1}$/${\mathrm{Torr}}^{2}$.(^{3}P_{2})$亚稳态三体破坏率为40${\mathrm{sec}}^{\ensuremath{-}1}$/${\mathrm{Torr}}^{2}$.结果中的估计不确定度为\ifmmod\pm\Else\TextPM\fi{}10%。
The time dependence of the vacuum-uv emissions from xenon was studied at pressures ranging from 4 to 1000 Torr. Excitation of the atoms was provided by a low-intensity electron beam. Measurements were made at the wavelengths of the $\mathrm{Xe}(^{3}P_{1})$ resonance line, the 1500-\AA{} (first) continuum, and the 1700-\AA{} (second) continuum. Two- and three-body collision coefficients for the destruction of $\mathrm{Xe}(^{3}P_{1})$ atoms and a three-body coefficient for $\mathrm{Xe}(^{3}P_{2})$ metastables were determined. A radiative lifetime of 99 nsec for the ${1}_{u}$ molecular state was measured at the wavelength of the second continuum. The pressure dependence of the decay constants at the three wavelengths leads to the following results: The collisional deexcitation rate for the transition $\mathrm{Xe}(^{3}P_{1})$ to $\mathrm{Xe}(^{3}P_{2})$ is ${9.1\ifmmode\times\else\texttimes\fi{}10}^{3}$ ${\mathrm{sec}}^{\ensuremath{-}1}$/Torr. The three-body coefficient for $\mathrm{Xe}(^{3}P_{1})$ atoms is 46 ${\mathrm{sec}}^{\ensuremath{-}1}$/${\mathrm{Torr}}^{2}$. The three-body destruction rate of $\mathrm{Xe}(^{3}P_{2})$ metastables is 40 ${\mathrm{sec}}^{\ensuremath{-}1}$/${\mathrm{Torr}}^{2}$. The estimated uncertainty in the results is \ifmmode\pm\else\textpm\fi{}10%.