[en] A review is given of recent results obtained with the high resolution (e,e'p) reaction at NIKHEF-K. The main lines of research concern high momentum components in /sup 3/He, the excitation of weak states in 1p-shell nuclei and the fragmentation of deep hole states in heavy nuclei

[en] The quest for absolute spectroscopic factors is an old one but has not yet been successfully realized experimentally. Various uncertainties in the DWBA analysis of one-nucleon transfer reactions impair the precision of deduced spectroscopic factors. We argue that these uncertainties may be reduced if information from electron scattering is employed in the analysis of hadron-induced reactions. High-resolution data of the quasi-free proton knockout reaction (e, e'p) are presented and the spectroscopic information obtained is discussed. We indicate that a synthesizing approach to electromagnetic and hadronic reactions may lead towards the goal of absolute spectroscopic factors

[en] Recent data of the proton knockout reaction in ³He and ⁴He are discussed. The information on high momentum components up to 500 MeV/c is presented and the role of the final state interaction in the ³He(e,e'p) reaction is emphasized. In ⁴He an unusually strong deviation of the impulse approximation is observed. The role of nucleon-nucleon correlations in the dense four-body system is discussed and possible explanations for the observed breakdown of the impulse approximation are investigated. 16 refs.; 5 figs

[en] Cross sections have been measured for inelastic electron scattering from ⁵⁰Ti. Magnetic form factors have been deduced for the J^π = 5⁺ level at E_x = 4.884(5) MeV, and for the levels with J^π = 4^- at E_x = 7.293(10) MeV, J^π = 8^- at E_x = 8.755(7) MeV, J^π = 3⁺ at 9.061(12) MeV, J^π = 5⁺ at E_x = 9.188(15) MeV and J^π = 8^- at E_x = 9.442(10) MeV. Charge form factors have been deduced for the yrast J^π = 2⁺, 4⁺ and 6⁺ levels. The form-factor data have been compared with shell-model and core-polarization calculations, emphasizing the radial shape of the model wave function in comparison with the q-dependence of the data. All observed magnetic form factors show a q-dependence corresponding to an up to 15% larger value of the Woods-Saxon radial parameter than in the singe-particle model approximation. (orig./HSI)

[en] The Comment by Lourie and Ulmer on our recent Letter asks for further clarification of our arguments and conclusions. The authors of the Comment correctly state that a modification of the electron-proton coupling, that is identical for the longitudinal (W/sub L/) and transverse (W/sub T/) response functions, would go unnoticed in the ratio of reduced cross sections R. However, the experimental observation that Rnot =1 does imply that the e-p coupling is different in the nuclear environment. Moreover, it implies that the longitudinal and transverse response functions are affected in a different way, invalidating their assumption of equal modifications. We recall that it it was the purpose of the ⁶Li(e,e'p) experiment

[en] This trend article presents a survey of the nuclear research programs of the secton NIKHEF-K with the 500 MeV electron-accelerator MEA in Amsterdam. After an introductory review of the principles of studying nuclei with electron-scattering experiments, some characteristic examples are discussed of inclusive (e,e')-experiments, in which only the scattered electron is detected, and exclusive (e,e'X)-experiments, in which the electron as well as the reaction product X are measured in coincidence. Finally an experiment with the ¹³C(γ,π-minus)¹³N is discussed which includes the study of pion-degrees of freedom in the nucleus. (H.W.). 7 figs

[en] A Comment on the Letter by P. E. Ulmer et al., Phys. Rev. Lett. 59, 2259 (1987)

No abstract available

[en] The spectral function for the reaction /sup 12/C(e,e'p)/sup 11/B has been measured for missing momenta between -110 and +220 MeV/c at a proton kinetic energy (T/sub p/) of 70 MeV. The experiment was performed with the coincidence setup of NIKHEF-K at Amsterdam. A missing energy spectrum with a resolution (after analysis) of 150 keV is shown

[en] The 500 MeV electron-scattering facility, designed and built in conjunction with the 500 MeV, 2.5% duty factor electron linear accelerator (MEA), has been completed. It alloys high-resolution (1x10^-4) single-arm (e,e') experiments with a QDD spectrometer and single-arm hadron detection [(γ,π) and reactions] with a large solid angle (17 msr) QDQ spectrometer. With both spectrometer coincidence experiments (e,e'chi) can be performed with a 225 keV missing-energy resolution and a 1 ns timing resolution. A comprehensive description is given of the beam-handling system, spectrometers, detection systems, data-handling techniques and other instrumentation. Finally, test results obtained at energies ranging from 70 to 460 MeV are presented. (orig.)