We have observed the dominant wing spectroscopy of energy pooling collision near the boundary layer involving Cs atoms under the condition of moderate-to-high optical depths at line-centre. It appears from our experim...We have observed the dominant wing spectroscopy of energy pooling collision near the boundary layer involving Cs atoms under the condition of moderate-to-high optical depths at line-centre. It appears from our experimental investigations that the energy-pooling fluorescence presents about 16 spectral lines, and all the lines can be assigned to the Cs atomic transitions. We find that all lines of the energy-pooling retrofluorescence from the heated Cs atomic vapour cell show two-peak profiles. In addition, its pumping power linear dependence in the energy pooling process has been measured and analysed.展开更多
We report experimentally the measured rate coefficients for the energy pooling （EP） collisions process Cs（5D） ＋Cs（5D） →Cs（6S）＋Cs（nL = 9D, 11S, 7F） in cesium densities of 1016 -1017 cm^-3. The 5D state was...We report experimentally the measured rate coefficients for the energy pooling （EP） collisions process Cs（5D） ＋Cs（5D） →Cs（6S）＋Cs（nL = 9D, 11S, 7F） in cesium densities of 1016 -1017 cm^-3. The 5D state was populated via 8S →7P→ 5D spontaneous emission following two-step pumping 6S → 6P3/2→ 8S. Since the 5D → 6P （3.0-3.6 μm） fluorescence could not be detected in this experiment, we carried out a relative measurement for the process 6P W 5D → 6S W 7D. The excited-atom density and spatial distribution were mapped by monitoring the absorption of a counterpropagating single-mode laser beam, tuned to 6P3/2→9S1/2 transition, which could be translated parallelly to the pump beam. The excited atom densities have been combined with the measured fluorescence ratios to yield EP rate coefficients. The average values for nL = 9D, 11S and 7F are 8.0 ± 4.0, 7.0 ± 3.5, and 9.3 ± 4.6 （in units of 10^-10cm^3/s）, respectively. Influence of the energy transfer process 11S ＋ 6S ←→7F ＋ 6S on the rate coefficients k11s and k7F is also discussed.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant Nos 60378004 and 10674086）, the Specialized Research Fund for Doctoral Program of Higher Education of China （Grant No 20040108002）, the State Key Development Program for Basic Research of China （Grant Nos 2006CB921603 and 2006CB921102）, the Shanxi Provincial Foundation for Leaders of Disciplines in Science, China, and the Program for Changjiang Scholars and Innovative Research Team in University （Grant No IRT0516）.
文摘We have observed the dominant wing spectroscopy of energy pooling collision near the boundary layer involving Cs atoms under the condition of moderate-to-high optical depths at line-centre. It appears from our experimental investigations that the energy-pooling fluorescence presents about 16 spectral lines, and all the lines can be assigned to the Cs atomic transitions. We find that all lines of the energy-pooling retrofluorescence from the heated Cs atomic vapour cell show two-peak profiles. In addition, its pumping power linear dependence in the energy pooling process has been measured and analysed.
基金This work was supported by the National Science Foundation of China under Grant No.10264004.
文摘We report experimentally the measured rate coefficients for the energy pooling （EP） collisions process Cs（5D） ＋Cs（5D） →Cs（6S）＋Cs（nL = 9D, 11S, 7F） in cesium densities of 1016 -1017 cm^-3. The 5D state was populated via 8S →7P→ 5D spontaneous emission following two-step pumping 6S → 6P3/2→ 8S. Since the 5D → 6P （3.0-3.6 μm） fluorescence could not be detected in this experiment, we carried out a relative measurement for the process 6P W 5D → 6S W 7D. The excited-atom density and spatial distribution were mapped by monitoring the absorption of a counterpropagating single-mode laser beam, tuned to 6P3/2→9S1/2 transition, which could be translated parallelly to the pump beam. The excited atom densities have been combined with the measured fluorescence ratios to yield EP rate coefficients. The average values for nL = 9D, 11S and 7F are 8.0 ± 4.0, 7.0 ± 3.5, and 9.3 ± 4.6 （in units of 10^-10cm^3/s）, respectively. Influence of the energy transfer process 11S ＋ 6S ←→7F ＋ 6S on the rate coefficients k11s and k7F is also discussed.
