Cs-K混合蒸气中Cs(8D)+K(4S)碰撞能量转移  

Collisional Energy Transfer for Cs(8D)+K(4S) in Cs-K Vapor Mixture

作　　者：沈异凡[1] 沈晓燕[2] 

机构地区：[1]新疆大学物理系,新疆乌鲁木齐830046 [2]华东理工大学化学系,上海200237

出　　处：《量子电子学报》2004年第1期11-14,共4页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金资助项目(10264004)

摘　　要：在Cs-K混合蒸气中,两步激发Cs原子到8D态,观察了Cs(8D)+K(4S)→Cs(5D)+K(4P)碰撞能量合并逆过程(REP,reverse energy pooling)。应用双调制技术探测K(4P)原子发射的荧光,基态K原子密度用光学吸收方法测量。得到了REP速率系数,讨论了其它过程对速率系数的影响。Using two steps excitation of the cesium 8D atomic level in a cesium-potassium vapor mixture, we observed the reverse heteronuclear energy-pooling collision Cs(8D)+K(4S) →Cs(5D)+K(4P) at thermal energy. A double-modulation technique has been used to select the fluorescence contributions at the K(4PJ) exit channels due only to the above reactions. The ground state potassium atom density was measured by the absorption of line from a K hollow-cathode lamp. The measured density and fluorescence intensities have been used to obtain reverse energy-pooling rate coefficients. The contribution to the rate coefficients from other processes is discussed.

关 键 词：碰撞能量合并逆过程 REP 速率系数 光谱学 激发态原子 CS K 

分 类 号：O562.5[理学—原子与分子物理]