【摘要】 利用He -Cd+ 激光器的 4 4 1.6nm线光解Cs2 分子 ,使Cs(6D)态得到布居 ,在Cs2 密度为 1～ 9×10 15cm-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为 9.6× 10 -18cm3 。测定Cs(6D3 / 2 )对 6D5/ 2 荧光强度分支比 ,得到 6 2 D态精细结构能级解离率之比为 0 .4 1。从翼激发得到的精细结构转移截面与从共振激发得到的截面结果相符。更多还原

【Abstract】 Population of the 6²D state of Cs atoms by photodissociation of Cs₂ molecules through the use of the fixed frequency line 441.6 nm of a He-Cd⁺ laser radiation is produced. Combining ratio of atomic to molecular fluorescence, the ratio of collisional rate coefficient to predissociation rate is estimated to be 9.6×10^-18 cm³. The branching ratio is defined as the ratio of 6D_3/2 to 6D_5/2 fluorescence. The branching is determined in the Cs density range between 1 and 9×10¹⁵ cm^-3. The ratio of the dissociation rates produced in the Cs 6²D fine-structure states is 0.41. Fine-structure changing cross section has been measured for wing excitation, the result is consistent with cross section obtained from resonant excitation of the 6²D states.更多还原