The (γ, p0) reactions in the giant dipole resonance region of 51V and 52Cr nuclei

Abstract The differential cross sections at 90° for the 51 V(e, p 0 ) 50 Ti and 52 Cr(e, p 0 + p 1 ) 51 V reactions have been measured over the giant dipole resonance region. These cross sections were used to obtain the differential cross sections of the 51 V(γ, p 0 ) 50 Ti and 52 Cr(γ, p 0 + p 1 ) 51 V reactions. The results show two peaks that appear at the same energies as the main peaks of the (γ, n) and (γ, p) cross section for both nuclei. The angular distributions of protons from the (e, p) reaction have also been measured at several points of the incident electron energy. The coefficients A 2 obtained by fitting with a series of Legendre polynomials, W ( θ ) = 1 + A 1 P 1 (cos θ )+ A 2 P 2 (cos θ ), varies with excitation energy. These results are discussed in terms of the direct-semidirect process considering isospin effects in the giant dipole resonance.