Shen Pinrui, Booth Donald, Liu Chang, Beattie Scott, Marceau Claude, Shaffer James P, Pawlak Mariusz, Sadeghpour H R
Quantum Valley Ideas Laboratories, 485 Wes Graham Way, Waterloo, Ontario N2L 6R1, Canada.
<a href="https://ror.org/04mte1k06">National Research Council Canada</a>, Ottawa, Ontario K1A 0R6, Canada.
Phys Rev Lett. 2024 Dec 6;133(23):233005. doi: 10.1103/PhysRevLett.133.233005.
We make absolute frequency measurements of Cs Rydberg transitions, |6S_{1/2},F=3⟩→|nS_{1/2}(n=23-90)⟩ and |nD_{3/2,5/2}(n=21-90)⟩, with an accuracy of less than 72 kHz. The quantum defect parameters for the measured Rydberg series are the most precise obtained to date. The quantum defect series is terminated at δ_{4}, showing that prior fits requiring higher order quantum defects reflect uncertainties in the observations. The precision of the measured quantum defects allow for the calculation of Rydberg electric-dipole transitions and fine-structure intervals extrapolated from high principal quantum numbers, to rival that of sophisticated many-body relativistic calculations carried out at low Rydberg principal quantum numbers. We quantitatively predict the contributions to the quantum defect parameters from core polarization and core penetration of Cs inner shell electrons. A new value for the ionization energy, consistent across the nS_{1/2} and nD_{3/2,5/2} Rydberg series, is reported at 31 406.467 751 48(14) cm^{-1}.
我们对铯里德堡跃迁|6S₁/₂,F = 3⟩→|nS₁/₂(n = 23 - 90)⟩和|nD₃/₂,₅/₂(n = 21 - 90)⟩进行了绝对频率测量，测量精度优于72千赫兹。所测里德堡系列的量子亏损参数是迄今为止得到的最精确的结果。量子亏损系列在δ₄处终止，这表明之前需要更高阶量子亏损的拟合反映了观测中的不确定性。所测量子亏损的精度使得能够计算从高主量子数外推的里德堡电偶极跃迁和精细结构间隔，其精度可与在低里德堡主量子数下进行的复杂多体相对论计算相媲美。我们定量预测了铯内壳层电子的芯极化和芯穿透对量子亏损参数的贡献。报道了一个在nS₁/₂和nD₃/₂,₅/₂里德堡系列中一致的电离能新值，为31 406.467 751 48(14) cm⁻¹。
