Total reaction cross section σ_reac of α-induced reactions from elastic scattering: the example 140Ce(α,α)140Ce

Mohr, Péter (2013) Total reaction cross section σ_reac of α-induced reactions from elastic scattering: the example 140Ce(α,α)140Ce. PHYSICAL REVIEW C, 87 (3). ISSN 2469-9985

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Abstract

Angular distributions of elastic 140Ce(α,α)140 Ce scattering are analyzed in the framework of the optical model from low energies around the Coulomb barrier up to about 40 MeV. From the local fits the total reaction cross section σreac is extracted. This procedure requires experimental scattering data with small uncertainties. The results for σreac are compared to predictions of different systematic global potentials. It is found that the total reaction cross section σreac is well predicted from all global potentials under study although the reproduction of the angular distributions is not perfect in all cases. In addition, the lower energy limit for the extraction of σreac from elastic scattering angular distributions is analyzed. Finally, the potentials under study are used to calculate the 143Nd(n,α)140Ce cross section, and the predictions are compared to experimental data.

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