Fig. 4: Evidence for the de-excitation path passing through the 0\({}_{2}^{+}\) state.
From: Reassigning the shapes of the 0+ states in the 186Pb nucleus

a Recoil-gated, α-tagged background subtracted γ-ray energy spectrum with a gate on the K-electrons of the 535 keV transition. b Recoil-gated, α-tagged background subtracted electron energy spectrum with a gate on the 261 keV γ rays. The peaks associated with 186Pb have been labelled with corresponding transition energies and positions of the K-, L- and M-conversion components are marked. The position of the L-electron component of the \({2}_{1}^{+}\to {0}_{2}^{+}\) transition (113 keV) is marked for visualisation.