Ba Rydberg原子M = 0电场常数标度能谱

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Ba Rydberg原子在标度 能ε=-300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. 关键词： 标度能谱 闭合轨道理论

Scaled-energy spectroscopy of barium M = 0 Rydberg atoms in an electric field

Choosing the polarization of the laser,changing the wavelength of the excitation laser and the strength of an external electric field synchronously to keep scal ed energy constant,we have measured M=0 constant scaled energy absorption spectra of barium Rydberg atoms at scaled energy ε=-300.Fourier transfor med recurrence spectra were compared with the closed orbit calculation for hydr ogen atom in the uniform approximation.The positions of experimental recurrence peaks fit well the theoretical ones,but the peak strengths differ remarkably,esp ecially 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.