Collision induced fluorescence in Cs vapor excited by a laser diode

M. Allegrini, F. De Tomasi, Slobodan Milošević +1 more

Two experiments on cesium vapor at relative low number densities (≊1010÷1013 cm−3), excited at the first resonance transition 6S1/2→6P3/2 (λ=852 nm) by a cw laser diode are reported. We have measured the rate coefficients at thermal energies for the energy pooling to the 7P levels. In presence of Ne as buffer gas we have observed a striking distortion of the line‐shape.

Huei Tarng Liou, Howard C. Yang, Peilin Dan

J. C. de Aquino Carvalho, Thierry Passerat de Silans

Yifan Shen, Kang Dai, Baoxia Mu +2 more

Rate coefficients for energy-pooling (EP) collisions Rb(5P_(J))+Cs(6P_(3/2))-->Rb(5S_(1/2))+Cs(nl_(J')) have been measured. Atoms were excited to Rb(5P_(J)) and Cs(6P_(3/2)) states using two single-mode diode lasers. To isolate the heteronuclear contribution in the fluorescence spectrum, a double-modulation technique has been 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(5P_(J)-->7S_(1/2)) and Cs(6P_(3/2)-->8S_(1/2)) transitions respectively, which could be translated parallelly to the pump beams. The excited atom densities are combined with the measured fluorescence ratios to determine cross sections for the EP processes. It was found that Rb(5P_(J))+Cs(6P_(3/2)) collisions are more efficient than Rb(5P_(3/2))+Cs(6P_(3/2)) collisions for populating Cs(4F_(5/2)), while the opposite is true for populating Cs(4F_(7/2)).

Armen D. Sargsyan, Anahit L. Gogyan, David G. Sarkisyan

沈异凡, 戴康, 穆保霞 +2 more

Rate coefficients for energy-pooling (EP) collisions Rb(5PJ) + Cs(6P3/2)→Rb(5S1/2) + Cs(nlJ’) have been measured. Atoms were excited to Rb(5PJ) and Cs(6P3/2) states using two single-mode diode lasers. To isolate the heteronuclear contribution in the fluorescence spectrum, a double-modulation technique has been 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(5PJ→7S1/2) and Cs(6P3/2→8S1/2) transitions respectively, which could be translated parallelly to the pump beams. The excited atom densities are combined with the measured fluorescence ratios to determine cross sections for the EP processes. It was found that Rb(5P1/2) + Cs(6P3/2) collisions are more efficient than Rb(5P3/2) + Cs(6P3/2) collisions for populating Cs(4F5/2), while the opposite is true for populating Cs(4F7/2).更多还原