Evidence for partial occupancy of the 3<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>proton orbit in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>208</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

TL;DRAbstract

The pronounced l=0 selectivity of the (e,e'p) proton knockout reaction has been exploited to determine the relative occupation of the 3${s}_{1/2}$ proton orbit in $^{205}\mathrm{Tl}$ and $^{206}\mathrm{Pb}$. This value, when combined with previous electron scattering data, enables us to extract in a largely model-independent fashion the absolute 3${s}_{1/2}$ occupation probability in $^{208}\mathrm{Pb}$. The depletion of the 3${s}_{1/2}$ proton orbit is found to be (18\ifmmode\pm\else\textpm\fi{}9)%, compatible with predictions of many-body theories.

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