Experimental investigation of deuteron photodisintegration in the δ-resonance region

Photonuclear reactions and dispersion relations

“…This is not the case for the quantity B which is genuinely a long range effect as appears in the expression (16). This quantity is dominated by the contribution of the giant dipole resonance which is two order of magnitude larger than B but nevertheless we will show that it is possible to extract B from an experimental analysis.…”

“…ii) we have taken the deuteron cross section as measured [16] multiplied by the Levinger factor with L =9. This last method gives a quasi-deuteron cross section which is larger in the isobar region and falls down more quickly above 400MeV.…”

The role of meson retardation in deuteron photodisintegration above pion threshold

“…Table II: full curve CC(stat1), dashed curve CC(stat2), dash-dotted curve CC(stat3), and dotted curve CC(stat4). Experimental data from [28] (•), [30] (✷) and [31] …”

“…Comparing the results of CC(ret1), CC(ret2) and CC(ret3), which differ by the value of α ∆N ρ , but which are equivalent concerning the description of the 1 D 2 channel in N N scattering, it turns out that the value of α ∆N ρ is of considerable importance for energies above about k lab = 380 MeV. But similar to N N scattering, an optimal value for α ∆N ρ could not be determined because of the rather large differences between the different experimental data sets at higher energies [28,30]. Finally, we discuss a few polarization observables.…”

Role of the Δ(1232) in the (γ,p) reaction

“…In this case, the use of Siegert's theorem 6 gives stable results because the charge density is actually calculated from the two-nucleon potential, and because the commutator [ V, p] is approximately independent of potentials adjusted to fit NN phase shifts. However, for heavier nuclei, the two-nucleon potential is not directly related to the charge density.…”