铁、铬、钒原子激发态的光电离截面

这篇文章分别在278~288 nm、335~361 nm、300~310 nm激光波长范围内分别报道过渡金属中的铁原子、铬原子和钒原子的共振增强多光子电离(REMPI)的实验结果. 实验中采用激光烧蚀和分子束相结合的技术制备金属原子.光离子产物由飞行时间质谱仪检测.根据共振电离离子信号对探测激光功率的依赖关系,得到原子激发态的光电离截面值.

Photoionization cross sections of the excited states of Iron, Chromium, and vanadium

This paper reports the results that the resonance enhanced multiphoton ionization (REMPI) of the iron, chromium and vanadium atoms of the transition metals in the range of 278~288 nm, 335~361 nm and 300~310 nm respectively. Laser ablation coupled with the molecular beam are used to produce free atoms in the experiment and the ions were detected using the time of flight mass spectrometer. According to the dependencies between resonance ionization ion signal and the power of the detection laser, we can obtain photoionization cross section value of the atomic excited state.