Ba Rydberg原子M=0电场常数标度能谱

Scaled-energy spectroscopy of barium M0 Rydberg atoms in an electric field

选择激光偏振方向 ,同步改变激发激光的波长 (即原子的激发能量E)和外加电场强度F ,使标度能ε =E F保持为常数 ,得到了原子束中BaRydberg原子在标度能ε =- 3 0 0时M =0激发的常数标度能谱 .由实验标度能谱的Fourier变换得到的回归谱与氢的均匀化近似后的闭合轨道理论计算相比较 ,发现实验回归谱的峰值位置与理论计算符合较好 ,而峰值强度则与理论相差较大 ,分析认为是由于受到核散射和双电子微扰态的影响所致 .

Choosing the polarization of the laser,changing the wavelength of the excitation laser and the strength of an external electric field synchronously to keep scaled-energy constant,we have measured M0 constant scaled-energy absorption spectra of barium Rydberg atoms at scaled-energy ε-3.00.Fourier transformed recurrence spectra were compared with the closed-orbit calculation for hydrogen atom in the uniform approximation.The positions of experimental recurrence peaks fit well the theoretical ones,but the peak strengths differ remarkably,especially in the region of scaled-action larger than 5.This may indicate a large effect of the barium core and the electron correlation on the electron dynamics.