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Zeitschrift für Physik D Atoms Molecules and Clusters

Fine structure excitation transfer between the lithiumD-lines by collisions with cesium atoms

Cedomil Vadla, D. Veža, Mladen Movre, Kay Niemax

Published Sep 1, 1992• 6 citations
Publisher
DOI
10.1007/bf01426359

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The fluorescence spectrum of cesium vapor was studied in a cell irradiated with the light of 852.3 nm resonance line from a single mode laser diode. From the intensities and spectra of the Cs and Cs2 fluorescence we identified several collisional and radiative processes in the excited cesium atom-dimer system. The atomic lines of the highly excited states were the result of collisional energy transfer from Cs(6P 3/2) + Cs(6P 3/2) to Cs(6D, 8S) atoms. The Cs2 (B 1 IIu) band formed in Cs (6P) + Cs2 (X1sigmag+) collisions. The fine-structure mixing in 6 2P atoms was studied through excitation transfer, energy-pooling collision, and collisional excitation transfer between Cs2 and Cs. The authors estimated the value of rate coefficient for the collisional energy transfer from 6P3/2 to 6P1/2 to be (5.2+/-2.1) x 10(-11) cm3 x s(-1). For the excitation transfer process Cs2 (B 1 IIu)+ Cs(6S)--> Cs2 (X 1sigmag+) + Cs(6P1/2 ), a rate coefficient of (1.0+/-0.4) x 10(-9) cm3 x s(-1) was yielded.

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Energy pooling collisions in cesium vapour and excitation transfer between the 6P_(3/2) and 6P_(1/2) levels

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Fine-structure mixing in 62P Cs atoms is studie d throu gh excitation transfer and energy-pooling collision. Cs atoms were excited to t he 6P__ 3/2 level using a single-mode laser diode. The resulting fluo r escence included a direct component arising from the optically excited state and a sensitized component due to the collisionally populated fine-structure state and the energy-pooling collisions. Measurement of relative intensities of the two components yielded the following cross section: σ(6P__ 3/2 →6P__ 1/2 )=(1.5±0.5)×10 -15 *cm2. Comparisons of our res ult with other experiments have been made.

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Collisional Excitation Transfer in Neutral Cesium Vapor

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peac•Jan 1, 1969•0 citations
The fluorescence spectrum of cesium vapor was studied in a cell irradiated with the light of 852.3 nm resonance line from a single mode laser diode. From the intensities and spectra of the Cs and Cs2 fluorescence we identified several collisional and radiative processes in the excited cesium atom-dimer system. The atomic lines of the highly excited states were the result of collisional energy transfer from Cs(6P 3/2) + Cs(6P 3/2) to Cs(6D, 8S) atoms. The Cs2 (B 1 IIu) band formed in Cs (6P) + Cs2 (X1sigmag+) collisions. The fine-structure mixing in 6 2P atoms was studied through excitation transfer, energy-pooling collision, and collisional excitation transfer between Cs2 and Cs. The authors estimated the value of rate coefficient for the collisional energy transfer from 6P3/2 to 6P1/2 to be (5.2+/-2.1) x 10(-11) cm3 x s(-1). For the excitation transfer process Cs2 (B 1 IIu)+ Cs(6S)--> Cs2 (X 1sigmag+) + Cs(6P1/2 ), a rate coefficient of (1.0+/-0.4) x 10(-9) cm3 x s(-1) was yielded.
Fine-structure mixing in 62P Cs atoms is studie d throu gh excitation transfer and energy-pooling collision. Cs atoms were excited to t he 6P__ 3/2 level using a single-mode laser diode. The resulting fluo r escence included a direct component arising from the optically excited state and a sensitized component due to the collisionally populated fine-structure state and the energy-pooling collisions. Measurement of relative intensities of the two components yielded the following cross section: σ(6P__ 3/2 →6P__ 1/2 )=(1.5±0.5)×10 -15 *cm2. Comparisons of our res ult with other experiments have been made.