在气体样品池条件下,研究了Rb(5PJ)+(Ne、N2)碰撞能量转移过程.对于5PJ与Ne的碰撞,电子态能量仅能转移为Ne原子的平动能.在与N2的碰撞中,向分子振转态的转移是重要的.调频半导体激光器稍微调离共振线,激发Rb原子至Rb(5P3/2)态,在不同的Ne或N2气压下,测量了5P1/2→5S1/2与5P3/2→5S1/2荧光强度比.利用速率方程分析,可以得到碰撞转移速率系数,对于Ne,5P3/2→5P1/2转移速率系数为1.53×10-12cm3s-1.对于N2,由5PJ+Ne和5PJ+N2二种情况下5P1/2与5P3/2荧光的相对强度比,利用最小二乘法确定5P3/2→5P1/2.转移速率系数为8.83×1011cm3s-1,5PJ态猝灭速率系数为1.25×10-10cm3s-1.对实验结果进行了定性的讨论.
参考文献
| [1] | Figl C,Goldstein R,Grosser J,et al.Nonadiabatic transitions in the exit channel of atom-molecule collisions:fine-structure branching in Na+N2[J].J.Chem.Phys.,2004,121(22):11068-11072. |
| [2] | Shen Yifan,Li Wanxing.Finestructure branching ratio for Rb-Ne optical collision[J].Chinese Journal of Quantum Electronics (量子电子学报),2001,18(1):20-23 (in Chinese). |
| [3] | Kleiber P D,Wong T H,Bililign S.Collisional energy transfer in Na(4p-3d)-He,H2 collisions[J].J.Chem.Phys.,1993,98(2):1101-1104. |
| [4] | Keramati B,Masters' M,Huenneqeens J.Excitation-transfer collisions in cesium vapor:Cs(5D5/2)+Cs(6S1/2)→Cs(5D3/2)+Cs(6S1/2)[J].Phys.Rev.,1988,A38(9):4518-4526. |
| [5] | Theodosiou C E.Lifetimes of alkali-metal-atom Rydberg states[J].Phys.Rev.,1984,A30(6):2881. |
| [6] | Cuvellier J,Fournier P R,et al.Inelastic collisions involving excited cesium atoms at thermal energies[J].Phys.Rev.,1975,A11(3):846-856. |
| [7] | Lin Yidong,Wang Wei,et al.Finestructure transition cross sections in collisions of Rb(5p) with molecules[J].Journal of Atomic and Molecular Physics(原子与分子物理学报),1988,5(1):687-694 (in Chinese). |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%