论文标题
分支比率，辐射寿命和过渡偶极矩
Branching ratios, radiative lifetimes and transition dipole moments for YbOH
论文作者
论文摘要
中等分辨率（$Δν$ 〜3 GHz）激光诱导的荧光（LIF）激发光谱在17300-17950 cm $^{ - 1} $范围内使用二维（激发和分散荧光）光谱记录。记录了高分辨率（$δλ$ 〜0.65 nm）分散激光诱导的荧光（DLIF）光谱和中介质分辨率LIF激发光谱中许多频段的辐射衰减曲线。使用离散变量表示方法预测$ \ tilde {x} \， ^2σ ^+$状态的振动能级，并与观察值进行了比较。分析辐射衰减曲线以产生荧光寿命。 $ \ tilde {a} \， ^2π_{1/2}（0,0,0,0）（0,0,0,0） - \ tilde {x}} {x} \， ^2σ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^+（0,0,0,0,0,0,0） ^2π_{1/2}（1,0,0） - \ tilde {x} \， ^2σ ^+（0,0,0）$，$ [17.73]ω= 0.5（0,0,0,0） - \ tilde {x}} {x} \ \， ^2σ ^+（0,0,0,0,0）$也记录了。分析了DLIF光谱以确定与辐射寿命相结合以获得过渡偶极矩的分支比率。讨论了对YBOH的激光冷却和捕获的影响。
Medium resolution ($Δν$ ~ 3 GHz) laser-induced fluorescence (LIF) excitation spectra of a rotationally cold sample of YbOH in the 17300-17950 cm$^{-1}$ range have been recorded using two-dimensional (excitation and dispersed fluorescence) spectroscopy. High resolution ($Δλ$ ~ 0.65 nm) dispersed laser induced fluorescence (DLIF) spectra and radiative decay curves of numerous bands detected in the medium resolution LIF excitation spectra were recorded. The vibronic energy levels of the $\tilde{X} \, ^2Σ^+$ state were predicted using a discrete variable representation approach and compared with observations. The radiative decay curves were analyzed to produce fluorescence lifetimes. DLIF spectra resulting from high resolution ($Δν$ < 10 MHz) LIF excitation of individual low-rotational lines in the $\tilde{A} \, ^2Π_{1/2}(0,0,0) - \tilde{X} \, ^2Σ^+(0,0,0)$, $\tilde{A} \, ^2Π_{1/2}(1,0,0) - \tilde{X} \, ^2Σ^+(0,0,0)$, $[17.73]Ω=0.5(0,0,0) - \tilde{X} \, ^2Σ^+(0,0,0)$ bands were also recorded. The DLIF spectra were analyzed to determine branching ratios which were combined with radiative lifetimes to obtain transition dipole moments. The implications for laser cooling and trapping of YbOH are discussed.
