氧化镱（YbO）基态的转动光谱与去微扰分析
Rotational spectra and de-perturbation analysis for ground state ytterbium oxide, YbO
AI总结：
研究人员通过FTMW测量与化学发光数据的组合差分析，改进YbO的光谱常数，构建含莫尔斯势与电子哈密顿元的模型分析其能级微扰，所得去微扰势为相关研究提供参考。
AI中文摘要：
对$^{174}$YbO的傅里叶变换微波光谱（FTMW）测量数据与早期近红外化学发光数据进行组合差分析，得到了大幅改进的YbO转动常数和离心畸变常数；这些常数在对$^{172}$YbO和$^{176}$YbO的进一步FTMW测量的多同位素体分析，以及分子中核尺寸相关的玻恩-奥本海默崩坏效应分析中得到验证。多个激发电子态与电子基态的低激发振动能级重叠，导致其振动间距及其他此前观测到的电子流形出现不规则性；研究人员假设采用莫尔斯势，构建包含基态及多个相互作用态振动能级的矩阵，并引入混合各态的电子哈密顿矩阵元，对该现象进行建模；同时假设采用莫尔斯振动波函数，数值计算振动能级重叠情况；所得各态的去微扰势，为该分子及其他含镱分子的持续实验与理论研究提供了参考。
英文摘要：
A combination difference analysis of Fourier transform microwave spectroscopy (FTMW) measurements of $^{174}$YbO combined with earlier near-infrared chemiluminescence data have resulted in much improved YbO rotational and centrifugal distortion constants. These have been confirmed in a multi-isotopologue analysis of further FTMW measurements of $^{172}$YbO and $^{176}$YbO and an analysis of nuclear-size-dependent Born-Oppenheimer breakdown effects in the molecule. Multiple excited electronic states overlap with low-lying excited vibrational levels of the electronic ground state leading to irregularities in its vibrational spacings and other previously observed electronic manifolds. This has been modeled with a matrix of the vibrational levels of the ground and multiple interacting states assuming Morse potentials and including electronic Hamiltonian matrix elements mixing the states. Vibrational level overlaps were calculated numerically assuming Morse vibrational wavefunctions. The resulting de-perturbed potentials for the states inform continuing experimental and theoretical work on this and other ytterbium-containing molecules.
