Rb 85 基态超精细塞曼能级双量子跃迁

Luo Caiyan, Aigars Ekers, Janis Klavins +1 more

The cross section σ = (8 ± 4) × 10 −15 cm 2 was determined for the Rb(7S) + Rb(5S) → Rb(5D) + Rb(5S) excitation energy transfer process, and the quenching cross section σ q = (2 ± 1) × 10 −14 cm 2 for the Rb(5D) state in collisions with ground state Rb atoms. Applying rubidium quasimolecular asymptotic potential curves at relatively large internuclear distances, a qualitative interpretation of the experimental results is presented. It is shown that the quenching of the Rb(5D) atoms in collisions may be explained by a reversed energy pooling process Rb(5D) + Rb(5S) → Rb(5P) + Rb(5P).

洪毅 Hong Yi, 侯霞 Hou Xia, 陈迪俊 Chen Dijun +6 more

郝恺, 周林, 汤彪 +4 more

邓玉华, 吕磊, 许瑾 +2 more

利用脉冲激光双光子激发Rb（5S）到Rb（5DJ，7S）态，在样品池条件下，利用原子荧光光谱方法研究了Rb（5DJ，7S）＋Rb（5S）的碰撞能量转移过程。利用三能级模型的速率方程分析，在不同的Rb（5S）密度下，通过对直接荧光和转移荧光的时间积分荧光强度的测量，得到了Rb（5D5／2）→Rb（5D3／2）精细结构转移截面为（3．7±0．9）×10^-14cm^2。而测得的碰撞转移到Rb（5DJ）以外态的截面是Rb（5D）-→Rb（7S）转移截面和碰撞能量合并逆过程截面之和，还可测得Rb（5D）→Rb（TS）的碰撞转移截面为（1．6±0．4）×10^-16cm^2，故Rb（5D）＋Rb（5S）→Rb（5P）＋Rb（5P）的截面分别为（3．1±1．2）×10^-14cm^2（对J=5／2）和（2．0±0．6）×10^-14cm^2（对J=3／2），5DJ态主要是通过碰撞能量合并的逆过程（即Rb（5DJ）＋Rb（5S）→Rb（5P）＋Rb（5P））猝灭。

Hidetoshi Suemitsu, H Kitaura, R Yokoyama +2 more

The relative production rates of Rb + and Rb + 2 ions through the multiphoton ionization (MPI) of Rb 2 and the effective order of non-linearity k for these ions were measured in the wavelength range 620-670 nm. The measured results indicated that these ions were produced by two- or three-photon ionization of Rb 2 . The Franck-Condon factors calculated for the transition from the ground state (X 1 Sigma + g ) to the first intermediate state (B 1 Pi u ) were in good agreement with the production rates obtained for Rb + and Rb + 2 ions. From these reasons the authors concluded that in the process of MPI of Rb 2 the transition to the Bu 1 Pi u state plays a crucial role in the production of both ions. The competitive relations between the production processes of Rb + 2 and Rb + ions were derived. In the wavelength range at around 669 nm the ratio of the number of Rb + ions to that of Rb + 2 ions produced through three-photon ionization of Rb 2 was about 4/1.

薛娇阳 Jiao-yang XUE, 邓琦琦 DENG Qi-qi, 李淑静 Shu-jing LI +2 more