Multiphoton ionization of atomic hydrogen in methane pyrolysis
Multiphoton ionization of atomic hydrogen in methane pyrolysis
复制标题
甲烷热解中原子氢的多光子电离
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
R. F. Porter
中科院分区：
文献类型：
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作者：
M. Chou;K. Putman;R. F. Porter
氢原子在大气压CH/sub 4/热解中通过243 nm处2S箭头向左1 S跃迁的双光子共振的三光子电离原位检测。在CD/sub 4/热解过程中观察到22.4 cm/sup-1/的预期氘同位素位移。H/sub 2/和D/sub 2/的热解离也分别观察到H原子和D原子类似的共振多光子电离信号。电离信号通过H/sub 2/ in平衡2 H平衡转换为绝对浓度。检测灵敏度估计约为。10/sup -9/-10/sup -8/摩尔分数。
Hydrogen atoms are detected in situ in atmospheric pressure CH/sub 4/ pyrolysis by three-photon ionization via two-photon resonance of the 2S arrow to the left 1S transition at 243 nm. An expected deuterium isotope shift of 22.4 cm/sup -1/ is observed during CD/sub 4/ pyrolysis. Similar resonant multiphoton ionization signals of H atoms and D atoms are also observed from thermal dissociation of H/sub 2/ and D/sub 2/, respectively. The ionization signals are converted into absolute concentration via the H/sub 2/ in equilibrium 2H equilibrium. The detection sensitivity is estimated to be approx. 10/sup -9/-10/sup -8/ mole fraction at 1-atm pressure.