Diaconescu Luca, Schaller Sascha, Fielicke André, Meijer Gerard
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin 14195, Germany.
J Phys Chem A. 2025 Jul 3;129(26):5843-5850. doi: 10.1021/acs.jpca.5c03336. Epub 2025 Jun 17.
Resonance-enhanced multiphoton ionization (REMPI) is used to characterize Rydberg states of YbF. Assignment of these Rydberg states to series that converge to various rotational and vibrational levels of the YbF cation leads to an accurate value for the ionization energy = 48706.57(8) cm of YbF. The values for the rotational constants of the YbF XΣ ground state are found as = 0.257(1) cm and = 0.255(3) cm, while the vibrational transition energy is Δ = 598.86(15) cm. Photoinduced Rydberg ionization (PIRI) measurements via a high-lying Rydberg state have been performed using an infrared free electron laser, confirming the Δ value.
共振增强多光子电离（REMPI）用于表征YbF的里德堡态。将这些里德堡态归属于收敛到YbF阳离子的各种转动和振动能级的系列，得出YbF的电离能准确值为48706.57(8)cm⁻¹。发现YbF XΣ基态的转动常数的值为B = 0.257(1)cm⁻¹和D = 0.255(3)cm⁻¹，而振动跃迁能量为Δν = 598.86(15)cm⁻¹。已使用红外自由电子激光通过一个高激发里德堡态进行了光致里德堡电离（PIRI）测量，证实了Δν值。
