Extended Data Fig. 3: Selected spectra obtained by two-step excitation.
From: Laser spectroscopic characterization of the nuclear-clock isomer 229mTh
The resonances recorded for different positions of the 484-nm ECDL show the observed isomeric peaks for the case of co-propagating beams (labelled ‘i’). The resonances that originate from collisions of ions in the intermediate state are labelled ‘c’. The description of the peaks and their total angular momenta are given in Extended Data Table 1. Black lines show the recorded data and blue lines represent a multi-Lorentz fit with fixed width, which is used to extract the line centres and frequency intervals.
