Excitation and decay of electric giant resonances in the 40Ca(e,e'x) and 40Ca(p,p'x) reactions

Measurement of the 6Li(e,e′p) reaction cross sections at low momentum transfer

“…No distinct structure of the GDR is observed. Such smooth ω dependence is similar to the photoreaction cross section for E γ < 30 MeV measured with monochromatic photons [6][7][8], and contrasts with the (e,e ′ p) reactions for heavier nuclei [9,10] in the GDR energy regions, where an ω dependence of the peak of the GDR was observed. A theoretical prediction of the GDR states which decay into the 3/2 + state of 5 He at E m = 21 MeV is shown in Fig.…”

“…In order to discuss the presence of the GDR excitation and its decay properties in 6 Li, we have measured the 6 Li(e,e ′ p) reaction cross sections for specific final states in the energy transfer region ω = 27-46 MeV, covering a sufficiently high-energy region where the highest component of the GDR is predicted. In the case of (e,e ′ p) reaction on heavier nuclei such as 12 C and 40 Ca [9,10], the GDR states are clearly observed as peaks in the cross sections at the same resonance energies observed in the photoreactions. The angular distributions for decay protons have the dipole characteristics, i.e.…”