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原子分子的共振多光子电离光谱是超灵敏激光光谱的一种.目前,它已广泛应用于研究分子的激发态、三重态和高里德堡态,包括研究这些态的光电离截面、能级结构、寿命、弛豫以及化学反应等.而激发态电离截面是研究原子分子结构的一个很重要的动力学参数.本文对钠分子采用等频双光子共振三光子电离法首次测得了钠分于2~1Πg态有关振转能级的光电离截面,同时也得到了其它的一些动力学参数.1 实验方法
Atomic molecule resonance multi-photon ionization spectroscopy is a kind of ultrasensitive laser spectroscopy, and it has been widely used to study the excited states, triplet states and high Rydberg states of molecules, including the photoionization cross sections of these states, the energy level Structure, life expectancy, relaxation and chemical reaction, etc. The excited ionization cross section is an important kinetic parameter to study the structure of atomic molecules.In this paper, sodium is first detected by the two-photon resonance three-photon ionization 2 ~ 1Πg state of the optical phase transition level of the ionosphere, but also got some other kinetic parameters.1 Experimental methods