Rb-N2(He)蒸气室压强及He、N2气渗漏测量
Pressure measurement of Rb-N2 (He) vapor chamber and gas permeation measurement of He and N2

利用原子吸收及谱线增宽方法测量了Rb-N2(He)蒸气室中的气体压强. 对Rb-N2(He)蒸气室中的气体渗漏进行了检测，实验发现：对N2气几乎观察不到明显的渗漏现象. 对于Rb-He950torr的高压蒸气室60天后的气体渗漏量为19%，渗漏比较明显. 测量了223-638torr范围Rb-N2蒸气室的5P3/2―5P1/2精细结构碰撞转移截面. 结果表明，随着温度升高，碰撞转移截面值也升高，温度为50℃、60℃、70℃时，碰撞转移截面分别为(1.03±0.32)×〖10〗^(-16) cm^2、(1.36±0.38)×〖10〗^(-15) cm^2 、(8.96±1.02)×〖10〗^(-15) cm^2. 压强在638torr时，碰撞转移截面随着温度升高增加较快，70℃以后碰撞转移截面迅速增加.
Using the atomic absorption and spectral line widening procedure, the gas pressure in a Rb-N2 (He) vapor chamber was measured. The gas permeation in the chamber was also evaluated. In the experiment, we found that no obvious permeation can be observed in the N2 gas. For the Rb-He vapor chamber with the high pressure of 950 torr for 60 days, the permeation of gas is measured as 19% and the leakage is deduced to be obvious. The cross sections of 5P3/2 ？C 5P1/2 fine structure collision transfer are measured for the vapor chamber with the Rb-N2 pressure of 223-638 torr. The results reveal that the collisional transfer section increases with the temperature. When the Rb-N2 pressure is 638 torr, the collision transfer cross sections are (1.03±0.32)×〖10〗^(-16), (1.36±0.38)×〖10〗^(-15) , and (8.96±1.02)×〖10〗^(-15) cm^2 with the temperature of 50℃, 60℃, and 70℃, respectively. It has been demonstrated that the collision transfer section rapidly increases with the temperature when the temperature is higher than 70℃.