Rb-N_2(He)蒸气室压强及He、N_2气渗漏测量  

Pressure measurement of Rb-N_2(He) vapor chamber and gas permeation measurement of He and N_2

作　　者：尼亚孜艾力.努拉合买提 刘静[1] 奥布力喀斯木.祖 戴康[1] 普拉提.艾合买提 NIYAZIAILI Nulahemaiti;LIU Jing;AOBULIKASIMU Zu;DAI Kang;PULATI Aihemaiti(School of Physics Science and Technology,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学物理科学与技术学院,乌鲁木齐830046

出　　处：《原子与分子物理学报》2018年第5期796-802,共7页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11364041)

摘　　要：利用原子吸收及谱线增宽方法测量了Rb-N_2(He)蒸气室中的气体压强.对Rb-N_2(He)蒸气室中的气体渗漏进行了检测,实验发现:对N_2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-N_2蒸气室的5P_(3/2)—5P_(1/2)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-N 2(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 N 2 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 5P 3/2– 5P 1/2 fine structure collision transfer are measured for the vapor chamber with the Rb-N 2 pressure of 223-638 torr.The results reveal that the collisional transfer section increases with the temperature.When the Rb-N 2 pressure is 638 torr,the collision transfer cross sections are(1.03±0.32)×10-16 cm 2,(1.36±0.38)×10-15 cm 2,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℃.

关 键 词：碱金属蒸气室 氦气渗漏 碰撞转移截面 谱线展宽 

分 类 号：O562[理学—原子与分子物理]