激光光原子飞行时间谱——一种新的研究光离解过程的方法

LASER PHOTOATOM TOF SPECTROSCOPY -A NOVEI METHOD OF INVESTIGATING PHOTODI SSOCIATION PROCESSES

光原子谱(PAS)是一种测量光离解过程产生的原子平动能的新方法。例如在光离解过程中(其中R为分子自由基),产生的H原子由共振双光子过程电离。利用飞行时间谱(TOF)测量H^+离子的平动能分布,由此可获得R基的内部能量分布。PAS法还可以发展来研究那些产生其它原子光碎片的光离解过程。

The photoatom spectroscopy (PAS) is a novel method of measuring kinetic energy of atoms produced in photodissociation processes. For exampie, H-atoms are-ioniz ed by a resonant two photons processes in the photodissociation process:RH + hv-→R(v,j)+Hwhere R is a molecular radical. The internal energy distribution of R radical is obtained from the kinetic energy distribution of H+-ion by time-of-fli-ght (TOF) method. PAS can be developed to investigate the photodissociation processes which have other atoms as photofragment.