852.3nm激光线共振激发Cs蒸气的荧光光谱  

Fluorescence Spectrum of Cesium Vapor Resonantly Excited by the 852.3 nm Laser Line

作　　者：李媛媛[1] 殷桂琴[1] 戴康[1] 沈异凡[1] 

机构地区：[1]新疆大学物理系,新疆乌鲁木齐830046

出　　处：《光谱学与光谱分析》2006年第9期1624-1626,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(10264004)资助项目

摘　　要：研究了Cs蒸气被单模半导体激光器的852.3nm线激发产生的荧光光谱。由Cs,Cs2的荧光及其强度确定了在受激Cs-Cs2系统中的若干碰撞和辐射过程。高位态原子线是由Cs(6P3/2)+Cs(6P3/2)到Cs(6D,8S)的碰撞能量合并形成的,Cs2(B1∏u)带则由Cs(6P)+Cs2(X1Σg+)碰撞转移产生。通过激发转移、能量碰撞合并和Cs2-Cs碰撞传能研究了62P原子的精细结构混合,得到了6P3/2→6P1/2碰撞转移速率系数是(5.2±2.1)×10-11cm3.s-1,给出了过程Cs2(B1∏u)+Cs(6S)→Cs2(X1Σg+)+Cs(6P1/2)的速率系数是(1.0±0.4)×10-9cm3.s-1。The fluorescence spectrum of cesium vapor was studied in a cell irradiated with the light of 852.3 nm resonance line from a single mode laser diode. From the intensities and spectra of the Cs and Cs2 fluorescence we identified several collisional and radiative processes in the excited cesium atom-dimer system. The atomic lines of the highly excited states were the result of collisional energy transfer from Cs（6P3/2 ）＋Cs（6P3/2 ）to Cs（6D, 8S） atoms. The Cs2 （B ^1Ⅱu） band formed in Cs（6P）＋Cs2 （X^1∑g^＋） collisions. The fine-structure mixing in 6^2P atoms was studied through excitation transfer, energy-pooling collision, and collisional excitation transfer between Cs2 and Cs. The authors estimated the value of rate coefficient for the collisional energy transfer from 6P3/2 to 6P1/2 to be（5.2±2.1） × 10^-11 cm^3 ·s^-1 For the excitation transfer process Cs2 （B ^1Ⅱu）＋ Cs（6S）→Cs2 （X ^1∑g^＋ ） ＋Cs（6P1/2 ）, a rate coefficient of （1.0±0.4） × 10^-9 cm^3 · s^-1 was yielded.

关 键 词：能量转移 速率系数 荧光 CS 

分 类 号：O562.4[理学—原子与分子物理] O562.5[理学—物理]