对汞亚稳态瞬态特性的研究

本文报道用脉冲光电流效应对Hg原子在低压放电中亚稳态6³P_0.2和第一共振态6³P₁衰减机制的研究。指出亚稳态原子间的碰撞电离、再复合及二极扩散过程是这种缓慢衰减的主要因素。实验测定了在不同温度下6³P_0,1,2态的平均有效寿命及扩散系数。实验结果与理论计算相符。由于6³P_0,1,2态在Hg放电中的关键作用,这种灵敏、简便和干扰小的 关键词：

THE STUDY OF RADIATIVE LIFETIME OF THE METASTABLE ATOMIC LEVEL IN MERCURY DISCHARGES BY OPTOGALVANIC SPECTROSCOPY

An optogalvanic spectroscopy method for study of atomic mercury metastable level is reported. The experiments are described in which the mercury discharge was irradiated with a dye laser at 577 nm and 579 nm, thus exciting the atoms from the 6¹P₁ level to 6³D level, which decays to the 6³P levels. By measuring the time dependence of the optogalvanic and fluore-sence signals, the effective lifetime and the ambipolar diffusion coefficients were obtained. The theoretical explanation for the experiments is presented.