存在缓冲气体的Na-Cs混合蒸汽中的三体碰撞  

THREE-BODY COLLISIONS IN Na-Cs MIXTURE IN THE PRESENCE OF BUFFER GAS

作　　者：沈异凡[1] 李万兴[1] 普拉提.艾合买提 

机构地区：[1]新疆大学物理系

出　　处：《原子与分子物理学报》1997年第4期531-534,共4页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金会

摘　　要：Ｎａ－Ｃｓ混合蒸汽中的碰撞能量合并已在［２］中研究过。当在池中充入缓冲气体后，碰撞过程出现新的特点，缓冲气体增大了Ｎａ（３Ｐ）和Ｃｓ（６Ｓ）间的能量转移，这可从测量由Ｎａ（３Ｐ）／Ｃｓ（６Ｐ）和Ｃｓ（６Ｐ）／Ｃｓ（５Ｄ）碰撞而被布居的高能级所发射的荧光得到证实。得到三体碰撞速率系数ｋ３＝５．９×１０－２７ｃｍ６ｓ－１。Energy pooling in the Na-Cs vapor mixture has been investigated. In this paper we discribe the peculiar features appearing when some buffer gas is introduced in the cell. The buffer gas enhances the energy transfer between Na( 3p) and Cs( 6S ), which is based on the measurement of the fluorescence from the highly excited states populated by the Na( 3P )/Cs( 6P ) and Cs( 6P )/Cs( 5D ) collisions. The three-body collision rate coefficient (k 3=5.9×10 -27 cm 6 s -1 ) is obtained.

关 键 词：三体碰撞 能量合并 速率系数 钠-铯混合蒸汽 

分 类 号：O562.5[理学—原子与分子物理]