Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1997-04-08
Nucl.Phys. A625 (1997) 633-650
Physics
Nuclear Physics
Nuclear Theory
12 pages, LaTeX, 4 figures included
Scientific paper
10.1016/S0375-9474(97)00595-2
The reduced cross section for exclusive ($e,e'p$) reactions has been studied in DWIA for the example of the nucleus $^{16}$O using a spectral function containing effects of correlations. The spectral function is evaluated directly for the finite nucleus starting from a realistic nucleon-nucleon interaction within the framework of the Green's function approach. The emphasis is focused on the correlations induced by excitation modes at low energies described within a model-space of shell-model configurations including states up to the $sdg$ shell. Cross sections for the $p$-wave quasi-hole transitions at low missing energies are presented and compared with the most recent experimental data. In the case of the so-called perpendicular kinematics the reduced cross section derived in DWIA shows an enhancement at high missing momenta as compared to the PWIA result. Furthermore the cross sections for the $s$- and $d$-wave quasi-hole transitions are presented and compared to available data at low missing momenta. Also in these cases, which cannot be described in a model without correlations, a good agreement with the experiment is obtained.
Amir-Azimi-Nili K.
Müther Herbert
Polls Artur
Skouras L. D.
Udias J. M.
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