Investigation of Alkali-Halide Photodissociation by Sub-Doppler Spectroscopy

在这次德俄合作中，将通过观察碱原子的自旋极化，对碱卤化物分子的光解进行实验研究。由脉冲可调谐染料激光器和倍频装置提供的近紫外脉冲可调谐辐射用于解离。用连续波探针激光束在碱原子共振线附近扫描，检测了碱原子光碎片的偏振。实验结果提供了在地球和行星大气物理化学中起关键作用的光解过程的动力学信息。此外，实验将提供到目前为止未知的这些分子激发态的原子间势的信息。

Within this German-Russian cooperation the photodissociation of alkali-halide molecules will be investigated experimentally by observing the spin-polarisation of the alkali atom. Pulsed tunable radiation in the near UV, provided by a pulsed tunable dye laser and a frequency doubling unit, is used for dissociation. The polarisation of the alkali atom photofragments is detected by means of a cw probe laser beam being scanned near the well-known alkali atom resonance lines. The experimental results give information on the dynamics of the process of photodissociation which plays a key role in physics and chemistry of the atmosphere of the earth and the planets. In addition, the experiments will provide information on up to now unknown interatomic potentials of excited states of these molecules.