Observation of Extremely High Vibrational Excitation in O2 from Inelastic Scattering of Rydberg H Atom with O2.
Observation of Extremely High Vibrational Excitation in O2 from Inelastic Scattering of Rydberg H Atom with O2.
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DOI：
10.1021/jz3010255
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发表时间：
2012-09
期刊：
影响因子：
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通讯作者：
Shengrui Yu;Shu Su;Kaijun Yuan;D. Dai;Xueming Yang
中科院分区：
文献类型：
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作者：
Shengrui Yu;Shu Su;Kaijun Yuan;D. Dai;Xueming Yang
利用氢原子Rydberg标记飞行时间（HRTOF）技术，测量了H*（n = 46）+ O2（v = 0，j = 1，3）→ H*（n '）+ O2（v'，j '）Rydberg原子非弹性散射过程的态分辨微分截面.广泛的振动激发O2产品已被观察到在两个碰撞能量为0.64和1.55 eV。实验结果表明，在低振动激发态的O2产品是明确的前向散射，而在高振动激发态的主要是后向散射。部分解决的旋转结构也被观察和分配。从平移到振动激发在向后的方向上的极高的能量转移的惊人的观察可以解释涉及质子和O2分子之间的电荷转移和可能的复杂的形成过程中的散射过程。
The state-resolved differential cross sections for the Rydberg-atom (RA) inelastic scattering process H*(n = 46) + O2(v = 0, j = 1,3) → H*(n') + O2(v', j') have been measured by using the H-atom Rydberg tagging time-of-flight (HRTOF) technique. Extensive vibrational excitation of O2 products has been observed at the two collision energies of 0.64 and 1.55 eV. Experimental results show that the O2 products in the low vibrationally excited states are clearly forward-scattered, whereas those in the highly vibrationally excited states are mainly backward-scattered. Partially resolved rotational structures were also observed and assigned. The striking observation of extremely high energy transfer from translational to vibrational excitation at the backward direction could be explained involving charge transfer between proton and O2 molecule and possibly complex formation during the scattering process.