Figure 1

Proposed level scheme for the high-spin states in ${}^{206}$Bi (left) compared with the results of shell-model calculations (right). Transitions in red were identified in the present study. Intensities are indicated by the widths of the arrows. The energies are not excitation energies, but rather binding energies relative to ${}^{208}$Pb, but shifted by $-$18.645 MeV so that the experimental ground state of ${}^{206}$Bi is at 0. Note that the low-spin level structure of ${}^{206}$Bi is not shown, but can be found in Ref. [9]. Note that there is uncertainty of 1$\hslash$ for the spin assignments to the levels located above the 7202-keV state; see text for a detailed discussion.Reuse & Permissions

Figure 2

Representative off-beam coincidence spectra. (a) Sum spectrum double gated on every pair of transitions at 150, 266, 543, 548, and 595 keV; (b) spectrum gated on the 361- and 713-keV transitions.Reuse & Permissions

Figure 3

Summed time distribution between the 937-keV $\gamma$ ray and any of the 361-, 480-, or 458-keV lines.Reuse & Permissions

Figure 4

Angular distributions for known (a) and four new, strong $\gamma$ rays (b) in ${}^{206}$Bi. Measured points are shown together with the fitted curves and the corresponding $A_2$ and $A_4$ coefficients.Reuse & Permissions