“波长等效激光”作用下铀原子的单色三光子共振电离谱测量

Measurement of the Single-color Three-photon Resonant Ionization Spectrum of Atomic Uranium under the ″Equivalent Wavelength Effect Laser″ Interaction

用Nd :YAG 5 32nm激光泵浦的混合染料激光得到了在相当于铜蒸气激光器泵浦染料激光的某个波段上增强的激光输出。测得了铀原子在 5 6 2～ 5 86nm波段内的单色三光子共振电离谱中 14 0个能级 ,其中5 75 814和 5 75 836nm两个峰很好地分开了 ,它们的相对强度也能测定。若用单一染料的激光是难以做到 。

Using Nd:YAG laser (532 nm) pumped mixed dye laser,we obtained the output of this dye laser enhanced at the wavelength interval equivalent to that given by the copper vapor laser pumped dye laser.This measure favored us with the measurement of single color three photon resonant ionization spectrum of atomic uranium in the range of 562-586 nm,which is otherwise not efficiently covered by Nd:YAG laser pumped dye laser with any single dye.Thus 140 UⅠ energy levels were obtained and the peaks of interest 575 814 nm and 575 836 nm were well resolved and their relative intensity determined.