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The nucleus    $$^{206}\mathrm{Pb}$$  206 Pb differs from the doubly magic nucleus    $$^{208}\mathrm{Pb}$$  208 Pb by two missing neutrons. In    $$^{208}\mathrm{Pb}$$  208 Pb most states at    $$E_x&lt; 7.4$$  E x &lt; 7.4  MeV are described by one-particle one-hole configurations. The lowest configurations with a  g    $$_{{ 9}/{2}}$$  9 / 2 particle and dominant  p    $$_{{ 1}/{2}}$$  1 / 2 ,  f    $$_{{ 5}/{2}}$$  5 / 2 ,  p    $$_{{ 3}/{2}}$$  3 / 2 holes and admixtures from  f    $$_{{ 7}/{2}}$$  7 / 2 and a few more configurations build an ensemble of two dozen states at 3.2   $$&lt;E_x&lt; 4.9$$  &lt; E x &lt; 4.9 MeV. They are described by rather complete orthonormal transformation matrices of two dozen states with spins from 2   $$^-$$  - to 8   $$^-$$  - to configurations. In    $$^{206}\mathrm{Pb}$$  206 Pb a similar ensemble of states is deduced from the analysis of angular distributions measured in 1969 for the    $$^{206}\mathrm{Pb}$$  206 Pb $$({{{\textit{p}}}, {{\textit{p}}}' })$$  ( p , p ′ ) reaction via the  g    $$_{{ 9}/{2}}$$  9 / 2 IAR in    $$^{207}\mathrm{Bi}$$  207 Bi . An equivalent    $$^{208}\mathrm{Pb}$$  208 Pb $$({{{\textit{p}}}, {{\textit{p}}}' })$$  ( p , p ′ ) experiment was performed in 1968 at the Max–Planck–Institut für Kernphysik at Heidelberg (Germany). New spins are determined for 32 states and 22 levels in    $$^{206}\mathrm{Pb}$$  206 Pb . The comparison to corresponding states in    $$^{208}\mathrm{Pb}$$  208 Pb studied especially in 1982 yields both remarkable similarities and clear differences. Sizeable  g    $$_{{ 9}/{2}}$$  9 / 2 p    $$_{{ 1}/{2}}$$  1 / 2 strength found in 4   $$^-$$  - and 5   $$^-$$  - states is interpreted as admixtures of    $${{\textit{p}}}{_{{ 3}/{2}}}^{-2}$$  p 3 / 2 - 2 and    $${{\textit{f}}}{_{{ 5}/{2}}}^{-2}$$  f 5 / 2 - 2 components to the ground state of    $$^{206}\mathrm{Pb}$$  206 Pb with dominant    $${{\textit{p}}}{_{{ 1}/{2}}}^{-2}$$  p 1 / 2 - 2 character. The description of nuclear states by shell model particle-hole configurations in the lead region needs the inclusion of collective excitations at already very low excitation energies. For the two isotopes    $$^{206}\mathrm{Pb}$$  206 Pb and    $$^{208}\mathrm{Pb}$$  208 Pb a rather good agreement of excitation energies and configuration mixing is observed for states at 3.7   $$&lt;E_x&lt; 4.7$$  &lt; E x &lt; 4.7 MeV.

Low lying particle-hole states in $$^\mathbf{206 }$$Pb and $$^\mathbf{208 }$$Pb and the shell model