Cs2分子的光解光谱

利用He-Cd激光器的441.6 nm线光解Cs2分子, 使Cs(n2L)(nL=7P, 6D)态得到布居, 在Cs密度1到9×1015 cm-3范围内测量原子荧光对分子荧光强度比, 得到碰撞转移率系数对解离率之比分别为2.9×10-17和7.4×10-18 cm3. 测定Cs nLJ对nLJ'荧光分支比, 得到72P, 62D态精细结构解离率之比分别为0.53和0.43. 从远翼激发得到的精细结构转移截面与从其他激发过程得到的截面结果相符, 给出了碰撞转移到6D态外(即Cs(6D)+Cs(6S)→Cs(6D)以外的态)的截面为1.9×10-14 cm2.

Photolytic Spectroscopy of Cs2 Molecules

Populations of the n2 L (nL = 7P, 6D) states of Cs atoms by photodissociation of Cs2 molecules through the use of the fixed frequence line 441.6 nm of a He-Cd laser radiation are produced. Combining ratios of atomic to molecular fluorescence at the Cs density range between 1 and 9 x 10(15) cm(-3), the ratios of collisional rate coefficient to predissociation rates are estimated to be 2.9 x 10(-17) cm3 and 7.4 x 10(-18) cm3, respectively. The branching ratios are defined as the ratios of nL(J) to nL(J) fluorescence. The ratios of the dissociation rates produced in n2 L fine-structure states are 0.53 and 0.43, respectively. Fine-structure changing cross section has been measured for far wing excitation, the result is consistent with cross section obtained from other excitation of the n2 L states. The cross section for excitation transfer out of the 6D doublet i.e., Cs(6D) + Cs(6S) --> states other than Cs(6D)] is 1.9 x 10(-14) cm2.