上层大气氧分子Herzberg态动力学研究进展

氧分子的三个电子激发的Herzberg态（A∧3∑∧ u,c∧1∑∧-u,A′∧3△u)在地球上层大气低温条件下的光化学动力学行为的实验研究为上层大气模型的建立提供重要的理论基础,本文介绍利用流动余辉技术和激光技术测量A∧3∑∧ 和c∧1∑∧-u态与大气分子碰撞反应速率常数的实验和结果,分析和讨论A∧3∑∧ u和c∧1∑∧-u态的高振动能级和低振动能级碰撞失活速率常数的巨大差别,并结合前人分析的结果提出自己的算法,最后,展望了实验研究上层气中Herzberg态动力学行为的前景。     

Optical Properties and Spectroscopic Parameters of Sm （DBM）3 Doped Polymethyl Methacrylate

Optical absorption spectra of Sm(DBM)3 doped PMMA (polymethyl methacrylate) in near infrared and visible region are presented. The energy levels were assigned and analyzed in terms of the free-ion Hamiltonian model. Energy levels and reduced matrix elements calculations were carried out using the complete 198 SLJ basis sets for the 4f^5 configuration. Judd-Ofelt parameters were evaluated and used to predict the radiative properties of the sample. The theoretical and experimental values for radiative lifetimes and branching ratios were discussed.