Rate coefficients for energy-pooling （EP） collisions Rb（5PJ）＋ Cs（6P3/2） →Rb（5S1/2）＋ Cs（nlJ^1） have been measured. Atoms were excited to Rb（5PJ） and Cs（6P3/2） states using two single-mode diode lasers....Rate coefficients for energy-pooling （EP） collisions Rb（5PJ）＋ Cs（6P3/2） →Rb（5S1/2）＋ Cs（nlJ^1） 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（6Pa/2） collisions are more efficient than Rb（5Pa/2）＋Cs（6P3/2） collisions for populating Cs（4F5/2）, while the opposite is true for populating Cs（4F7/2）.展开更多
The new mixed borates with formula(Rb 2 Ca [B 4 O 5 (OH) 4 ] 2 ·8H 2 O and Cs 2 Ca [B 4 O 5 (OH) 4 ] 2 ·8H 2 O)were prepared by reaction Rb (Cs )-borate aqueous solution with CaCl 2 .Two kinds of compounds w...The new mixed borates with formula(Rb 2 Ca [B 4 O 5 (OH) 4 ] 2 ·8H 2 O and Cs 2 Ca [B 4 O 5 (OH) 4 ] 2 ·8H 2 O)were prepared by reaction Rb (Cs )-borate aqueous solution with CaCl 2 .Two kinds of compounds were characterized by chemical analysis,X-ray powder dif fraction,FT-IR spectra and thermal analysis.展开更多
基金This work was partially supported by the National Natural Science Foundation of China under Grant No.10264004.
文摘Rate coefficients for energy-pooling （EP） collisions Rb（5PJ）＋ Cs（6P3/2） →Rb（5S1/2）＋ Cs（nlJ^1） 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（6Pa/2） collisions are more efficient than Rb（5Pa/2）＋Cs（6P3/2） collisions for populating Cs（4F5/2）, while the opposite is true for populating Cs（4F7/2）.
文摘The new mixed borates with formula(Rb 2 Ca [B 4 O 5 (OH) 4 ] 2 ·8H 2 O and Cs 2 Ca [B 4 O 5 (OH) 4 ] 2 ·8H 2 O)were prepared by reaction Rb (Cs )-borate aqueous solution with CaCl 2 .Two kinds of compounds were characterized by chemical analysis,X-ray powder dif fraction,FT-IR spectra and thermal analysis.
