Figure 2

Comparison of calculated and measured spectra considering (a) pure two-level resonant transitions, i.e., \(3 \rightarrow 2'\), \(3 \rightarrow 3'\) and \(3 \rightarrow 4'\); (b) a transition resonant at \(3 \rightarrow 2'\) with neighboring hyperfine transitions of \(3 \rightarrow 3'\) and \(4'\), a transition resonant at \(3 \rightarrow 3'\) with neighboring transitions of \(3 \rightarrow 2'\) and \(4'\), and a transition resonant at \(3 \rightarrow 4'\) with neighboring transitions of \(3 \rightarrow 2'\) and \(3'\); (c) experimentally measured spectra for resonant transitions \(3 \rightarrow 2'\), \(3 \rightarrow 3'\), and \(3 \rightarrow 4'\).