Cd110,116(α,α)

G. G. Kiss

¹

,

P. Mohr

²

,

Zs. Fülöp

³

et al.

Abstract

The elastic scattering cross sections for the reactions 110,116 Cd(α,α) 110,116 Cd at energies above and below the Coulomb barrier are presented to provide a sensitive test for the α-nucleus optical potential parameter sets. Additional constraints for the optical potential are taken from the analysis of elastic scattering excitation functions at backward angles which are available in literature. Moreover, the variation of the elastic α scattering cross sections along the Z = 48 isotopic and N = 62 isotonic chain is investigated by the study of the ratios of the 106,110,116 Cd(α,α) 106,110,116 Cd scattering cross sections at E cm ≈ 15.6 and 18.8 MeV and the ratio of the 110 Cd(α,α) 110 Cd and 112 Sn(α,α) 112 Sn reaction cross sections at E cm ≈ 18.8 MeV, respectively. These ratios are sensitive probes for the α-nucleus optical potential parametrizations. The potentials under study are a basic prerequisite for the prediction of α-induced reaction cross sections (e.g., for the calculation of stellar reaction rates in the astrophysical p or γ process).

High precision113In(α,α)113In elastic scattering at energies near the Coulomb barrie

“…A similar experimental setup was used in previous experiments [35][36][37][38][39][40] and is described in more detail in [42]. The following paragraphs provide a short description of the experimental setup.…”

“…Several α elastic scattering experiments on the target nuclei 89 Y, 92 Mo, 106,110,116 Cd, 112,124 Sn, and 144 Sm have been performed at ATOMKI in recent years [35][36][37][38][39][40]. A summary of this work in given in [9,41].…”

“…These works were extended to investigate the variation of the parameters of the OMP along the N = 50 and Z = 48 isotonic and isotopic chains by the study of the 89 Y(α, α) and 106,110,116 Cd(α, α) reactions [39,40]. Based on the high precision data measured at ATOMKI, a new global OMP has been developed [9].…”

“…(ii) In recent years several elastic α scattering experiments have been performed at ATOMKI [35][36][37][38][39][40]. As a first step a local potential analysis with consistent standardized parameterizations of the real and imaginary parts has been performed on the high precision experimental data.…”

Systematic study of theα-optical potential via elastic scattering near theZ=50region forp-process nuclei

“…These α potential models were often parameterized by fitting the differential cross sections of elastic scattering at relatively high energies. In order to determine better local α-optical potentials for calculating the (α,γ) cross sections, α-elastic scattering experiments have been performed at lower and more relevant energies on p process related targets [19][20][21][22][23][24].…”