Abstract

The quasifree scattering process $^{12}\mathrm{C}(e, {e}^{\ensuremath{'}}p)^{11}\mathrm{B}$ is investigated in the distorted wave impulse approximation using the effective Hamiltonian of McVoy and Van Hove. The off-energy-shell effects are correctly taken into account by replacing the momentum of the proton by the gradient operator $\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\nabla}}$. The influence of the spin-orbit coupling in the final state interaction and the nuclear deformation has also been studied. The results indicate that the effect of the gradient operator is to decrease the cross section over a wide range of momentum and to shift the peak of the cross section towards the higher momentum region. It is found that the spin-orbit interaction affects only the maxima and minima of the cross section. The deformed oblate potential of Nilsson with $N$ and $N+2$ coupling for the bound state wave function is found to improve the agreement of the cross section with the experimental data.NUCLEAR REACTIONS Quasifree electron scattering from $^{12}\mathrm{C}$, distorted wave impulse approximation, off-shell effects, gradient operator for the proton, nuclear deformation, oblate deformed Nilsson wave function.

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