High-momentum protons in exp 208 Pb

High-momentum components of proton momentum distributions in exp 208 Pb have been studied from 300 to 500 MeV/c with (e, e'p) reaction. Cross sections were measured with 180 keV excitation-energy resolution for transitions to the low-lying 1/2 exp + , 3/2 exp + , 1/12 exp - , and 7/2 exp + states in exp 207 Tl. The data are compared to distorted-wave impulse-approximation calculations with mean-field wave functions and with wave functions that include nucleon-nucleon correlations. The data are substantially larger than mean-field predictions. The observed excess strength at low excitation energy appears to be mainly due to long-range correlations and not to short-range and tensor correlations.