Search for nucleon-nucleon correlations in the proton spectral function of 208Pb

I Bobeldijk, HP Blok, HB van den Brink, GE Dodge, WHA Hesselink, E Jans, WJ Kasdorp, L Lapikas, JJ van Leeuwe, C Marchand, G Onderwater, A Pellegrino, M van Samsbeek, CM Spaltro, G van der Steenhoven, JJM Steijger, JA Templon, MA van Uden, R de Vries, PKAD Huberts

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Cross sections for the reaction Pb-208 (e,e'p) have been measured with the continuous electron beam from the Amsterdam Pulse-Stretcher facility at NIKHEF-K. The spectral function has been extracted for protons with initial momenta of 300 to 500 MeV/c and binding energies up to 26 MeV. The data are compared to calculations with and without inclusion of nucleon-nucleon correlations. Mean-field predictions significantly underestimate the data and the discrepancy increases with binding energy. For transitions to the valence states the discrepancy is removed by introducing long-range correlations. Above the two-nucleon emission threshold long-range and short-range correlations reduce the discrepancy, but are insufficient to fully account for the measured strength.

Original languageEnglish
Pages (from-to)32-38
Number of pages7
JournalPhysics Letters B
Issue number1
Publication statusPublished - 22-Jun-1995
Externally publishedYes



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