Analysis of refractive effects in He-4+N-15, O-18, Mg-24, Ca-44, and Zr-90 scattering processes at energies in the range E((4) He)=13-15 MeV per nucleon by using smooth monotonic dependences of the nuclear phase shift on the orbital angular momentum

摘要

The differential cross sections for the elastic scattering of He-4 nuclei on N-15, O-18, Mg-24, Ca-44, and Zr-90 nuclei in the energy range E(He-4) = 13-15 MeV per nucleon are analyzed on the basis of the model-independent S-matrix approach by using an evolution algorithm. It is shown that a quantitative description of the cross sections under analysis is ensured by smooth monotonic dependences of the real and imaginary parts of the nuclear phase shift on the orbital angular momentum.