Experimentelle Ermittlung differentieller Wirkungsquerschnitte der Reaktionen "4He(e,e'p), "4He(e,e'pp) und "4He(e,e'dp) mit besonderem Hinblick auf deren moegliche Indikationen fuer Nukleon-Nukleon-Korrelationen im Heliumkern

Absolute, differential "4He(e,e'p), (e,e'pp), and (e,e'dp) cross-sections in extended kinematical regions which are corresponding to the 'dip' between the quasielastic and the #DELTA#-resonance peak in the "4He(e,e') response-function have been measured at the high duty factor Electron Stretcher Accelerator ELSA of Bonn University. The scattered electrons were detected with a magnetic spectrometre, the hadrons with two sets of large-area plastic-scintillator telescopes. The measured cross-sections indicate important contributions from reactions on correlated nuclear pairs. In the "4H(e,e'p) cross-sections the two-body break-up, "4He(e,e'p)t, and the quasifree production of pions are visible as well. On the assumption of the Impulse-Approximation momentum-density distribution of the proton in "4He have been derived from the measured cross-sections of the two-body and of the continuum break-up of the "4He nucleus. (orig.)SIGLEAvailable from TIB Hannover: RN 4852(03-04) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman