Abstract
The alpha-cluster model has been employed to generate the alpha-cluster and nucleon (matter) density distributions for light even-even (N = Z < 20) nuclei. This approach is applied to C-12, O-16, Ne-20, (24)mg, Si-28, S-32, Ar-36, and Ca-40 nuclei. The three-parameter Fermi (3 pF) form has been proposed for the alpha-cluster density distributions inside these nuclei. Accordingly, the corresponding matter density distributions have been deduced. The extracted density parameters revealed clear mass dependences. The obtained densities are tested through constructing the alpha+nucleus optical potential in the framework of the single and double folding models. The single and double folding procedures are carried out based upon the alpha-alpha and JLM nucleon nucleon (nn) effective interactions, respectively. For the sake of comparison, the CDM3Y6 effective nn interaction is also considered in the double folding calculations. The extracted potentials have been introduced in the analysis of alpha-particle elastic scattering from C-12, O-16, Ne-20, (24)mg, and Si-28 targets. Forty-seven sets of data through a wide range of energy (31-240MeV) have been investigated using the derived potentials. Successful predictions of the observed angular distributions of elastic scattering differential cross sections are obtained. The extracted reaction cross sections are also investigated.