Sr原子高激发态光谱的研究

采用三台染料激光器分步激发Ｓｒ原子，利用自电离过程产生离子或电子。当固定第一和第三步激光发光之波长而扫描第二步激发光之波长时，便可获得Ｓｒ原子５ｓｎｓ＾１Ｓ０和５ｓｎｄ１，３Ｄ２系列的光谱。用多通道量子数亏损理论分析和描述实验光谱，不仅成功地证实了预测了已测和未测实验能级及其波函数，而且能够给出这些高激发态的自发辐射寿命。

Study of Highly Excited States of Atomic Strontium

Three dye lasers are used to excited Sr atoms to obtain ions and electrons through autoionization process. The wavelength of the second laser is scanned when those of the first and third lasers are fixed, through which spectra of Sr 5sns 1S 0 and 5snd 1, 3 D 2 series are measured. Experimental spectra are described and analyzed by multichannel quantum defect theory, which verifies measured data and predicts unmeasured data with their energies and wave functions. The study also provides radiative lifetimes of highly excited states. Agreement between the theory and experiment is achieved. This work also agrees well with previons studies.