One photon dissociation and multiphoton dissociative ionization of bromochlorodifluoromethane (CF2BrCl) at 267 nm region
One photon dissociation and multiphoton dissociative ionization of bromochlorodifluoromethane (CF2BrCl) at 267 nm region
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DOI：
10.1063/1.1591728
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发表时间：
2003-07
影响因子：
4.4
通讯作者：
Jianhua Huang;Dadong Xu;J. S. Francisco;W. Jackson
中科院分区：
文献类型：
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作者：
Jianhua Huang;Dadong Xu;J. S. Francisco;W. Jackson
采用飞行时间质谱结合离子速度成像技术研究了CF2 BrCl在267 nm附近的光解动力学。溴原子通过2+1共振增强多光子电离探测。CF2 BrCl的单光子解离通道产生基态Br（2 P3/2）和激发态Br（2 P1/2）的溴原子。每个通道的平移能量和角分布来自两个溴原子的二维图像，使用反投影方法。飞行时间质谱表明，CF2 Cl+离子也形成与聚焦激光在259-270 nm区域。在这个波长区域拍摄了六张图像，它们显示了几个小组最近报道的典型特征，这些特征归因于多光子吸收引起的解离电离。在能量和角分布的变化作为波长的函数的CF2 Cl+的共振增强的多光子散射描述。
The photodissociation dynamics of CF2BrCl have been studied near 267 nm using time-of-flight mass spectrometry combined with ion velocity imaging. The bromine atoms are probed via 2+1 resonance enhanced multiphoton ionization. The one-photon dissociation channels of CF2BrCl produce bromine atoms in both ground state Br(2P3/2) and excited state Br(2P1/2). Translational energy and angular distributions for each channel are derived from the two-dimensional images of both of the bromine atoms using the back-projection method. The time of flight mass spectra indicate that the CF2Cl+ ions are also formed with the focused laser in the 259–270 nm region. Six images were taken in this wavelength region and they show the typical characteristics recently reported by several groups that are attributed to dissociative ionization arising from multiphoton absorption. The changes in the energy and angular distributions of CF2Cl+ as a function of wavelength are described in terms of a resonance enhanced multiphoton dissoc...