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Resonant Reaction in Rb--Cs Vapour Mixture Rb(5P1/2) + Cs(6P3/2) → Cs(8S1/2)+Rb(5S1/2) |
| SHEN Yi-Fan;DAI Kang;MU Bao-Xia; WANG Shu-Ying;CUI Xiu-Hua |
| Department of Physics, Xinjiang University, Urumqi 830046 |
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| Cite this article: |
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SHEN Yi-Fan, DAI Kang, MU Bao-Xia et al 2006 Chin. Phys. Lett. 23 1173-1175 |
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Abstract We experimentally study energy-pooling collision in the Rb--Cs vapour mixture at low densities in a cell. Atoms are excited to Rb(5P1/2) and Cs(6P3/2) states using two single-mode diode lasers. To isolate the heteronuclear contribution in the fluorescence spectrum, a double-modulation technique is adopted. The excited-atom density and spatial distribution are mapped by monitoring the absorption of a counterpropagating single-mode diode laser beam, tuned to Rb(5P1/2 → 7S1/2) and Cs(6P3/2 → 8S1/2) transitions, respectively, which could be translated parallel to the pump beams. The excited atom densities are combined with the measured fluorescence ratios to determine cross section for the energy-pooling process [i.e. Rb(5P1/2) +Cs (6P3/2) → Cs(8S3/2)+Rb (5S1/2)]. The cross section is 3.79×10-14cm2 ± 45%.
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| Keywords:
34.90.+q
34.50.Rk
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Published: 01 May 2006
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| PACS: |
34.90.+q
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(Other topics in atomic and molecular collision processes and interactions)
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34.50.Rk
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(Laser-modified scattering and reactions)
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