Probabilities of the energy-level transitions between the cesium atom excited states

王志宏 Wang Zhihong, 张锦芳 Zhang Jinfang, 曾昭卿 Zeng Zhaoqing +3 more

Scott G. Leslie, J. T. Verdeyen, W. Millar

Fluorescence from highly excited atomic states has been observed in cesium vapor irradiated by a dye laser tuned to either one of the 62S–72P transitions. The emission originated from levels as high as 1 eV above the state being pumped. The high-lying states are believed to be excited by an electronic energy transfer induced in a collision of two atoms occupying lower excited levels.

Edward A. Manykin, M. I. Ozhovan, Pavel P. Poluektov +1 more

Shunyan Wang, You Wang, He Cai +8 more

As two main atomic alkalis, rubidium (Rb) and cesium (Cs) have the similar energy-level structures. The energy transfer caused by collisions between rubidium and cesium atoms is a crucial factor for a vapor system. When such a vapor is irradiated with one component of rubidium resonance doublet, energy transfer will be induced by inelastic collisions between the excited rubidium atoms and the unexcited rubidium atoms, and between the excited rubidium atoms and the unexcited cesium atoms as well. It is noteworthy that the energy transfer between atomic rubidium and cesium is performed as cross relaxation. In this study, we theoretically investigate the effects of cross relaxations between the upper-state levels of atomic rubidium and cesium on the population distribution of the gas media. It has been demonstrated that the intensity of cross relaxations in this system is too weak to greatly affect the population distributions of atomic rubidium and cesium under the different temperatures. The conclusion might be helpful to better understand the physical features of alkalis.

Wayne B. Nottingham, K.G. Hernquist

Решетов Владимир Александрович, Igor V. Yevseyev

The three-level Λ-type atom with degenerate atomic levels is considered, one of its transitions being driven by the coherent field, the other being coupled to the single-mode quantized field of the high-Q cavity. The probability of emission of a single photon in the cavity via Raman scattering versus the mutual orientation of polarization vectors of the cavity mode and of the driving coherent pulse is studied. The efficiency of the retrieval of a single-photon excitation, stored in the atomic ground state (as suggested, e.g., in paper [1]), versus the mutual orientation of polarizations of cavity modes and of the coherent ``write'' and ``read'' pulses is also investigated. The numerical calculations are carried out for the transitions between hyperfine components of the ground 6 S 1/2 and excited 6 P 3/2 states of Cesium atoms, which were exploited in the experiments [1]. The optimal polarizations providing the maximum probability of photon emission and maximum retrieval efficiency are determined.