Resonance enhanced two-photon ionization studies in a supersonic molecular beam: Bromobenzene and iodobenzene
Resonance enhanced two-photon ionization studies in a supersonic molecular beam: Bromobenzene and iodobenzene
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超声分子束中的共振增强双光子电离研究：溴苯和碘苯
DOI：
10.1063/1.440000
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发表时间：
1980
影响因子：
4.4
通讯作者：
R. Smalley
中科院分区：
文献类型：
--
作者：
T. G. Dietz;M. Duncan;M. G. Liverman;R. Smalley
利用共振增强双光子电离技术研究了两种单取代卤代苯分子的1B 2（ππ*）<$1A1跃迁。通过飞行时间质谱仪完成光离子的检测。使用这种技术，溴苯的1B 2 <$1A1系统已经被观察到了很好的灵敏度，即使1B 2态的总衰变率大于1×1011 sec−1。当在碘苯中探测到相同的跃迁时，没有观察到离子信号，这使我们能够将其衰减速率的下限定为4×1013秒-1。
The 1B2(ππ*)←1A1 absorptions of two monosubstituted halobenzenes have been investigated using resonance enhanced two‐photon ionization in a pulsed supersonic molecular beam. Detection of the photoions was accomplished by means of a time‐of‐flight mass spectrometer. The 1B2←1A1 system of bromobenzene has been observed with good sensitivity using this technique, even though the total decay rate of the 1B2 state is greater than 1×1011 sec−1. No ion signal was observed when the same transition was probed in iodobenzene, allowing us to place a lower limit on its decay rate of 4×1013 sec−1.