【摘要】 利用自制YAG三倍频泵浦的染料激光器激发钡原子。采用热二极管检测双光子共振离化信号。得到钡原子偶宇称三个里德堡系列:6sns¹S₀（n=11～46）、6snd¹D₂（n=9～60）、6snd³D₂（n=10～28）;五个双电子激发组态:5d8s³D₂、5d8s¹D₂、5d7d³F₂、5d7d¹D₂和5d7d³P₀。用Lu-Fano图进行了讨论。更多还原

【Abstract】 Barium atoms pumped by a dye laser can absorb two photons and transit to high-lying states. By using a heat diode to detect ionization signals, we obtained three even-parity Rydberg series 6 ns 1S0(n=11～46), 6snd 1D2(n =9～60) and 6snd3D2 (n=10～28), as well as five perturbing levels 5d833D2, 5d83, 5d8s 1d2,5d7d 3F2, 5d7d3 P0 and 5d7d 1D2. The Lu-Fano plot is used in our discussion.更多还原