The phenomenological optical potential for α-scattering from nuclei in the Ca region

High precisionY89(α,α)Kiss1, Mohr2, Fülöp3 et al. 2009Phys. Rev. C

“…Some authors investigated the use of higher-order terms of the Woods-Saxon function, too [49,50]. Modelindependent parametrizations have also been studied, either with spline functions [49,51] or a series of Fourier-Bessel functions added to the Woods-Saxon parametrizations [52,53] or with a sum of Gaussians [50]. A folding model has been introduced by Kobos et al [54].…”

“…(i) The regional α-nucleus potential of Avrigeanu et al [4] corresponds to average mass-, charge-, and energy-dependent Woods-Saxon parameters based on local potentials obtained by analysis of 108 experimental angular distributions of α-particle elastic scattering on target nuclei from 50 Ti to 124 Sn and α-particle energies from 8.1 to 49 MeV. The local Woods-Saxon parameter sets provided by the analysis of the new experimental data (Table 2 of Ref.…”

$ \alpha$ α -cluster states in 46,54Cr from double-folding potentials

“…6 and Tables 3 and 4); however, this results in a relatively poor reproduction of the experimental data at forward angles. [33,46]: The phase shift fit (black dotted) reproduces the experimental data almost perfectly (thus, it is practically invisible behind the experimental data). The folding potential using the experimental charge density distribution of 50 Ti (green dash-dotted) is slightly too narrow, resulting in a poor description of the forward angle diffraction pattern (see enlarged area in the upper plot); a better description of the experimental data is obtained after scaling the radial dependence by 2% (full blue).…”

“…Second, folding potentials were calculated for 50 Ti-α using either the theoretical density from TALYS or a matter density derived from the experimental charge density [30]. Both potentials were applied to 50 Ti(α,α) 50 Ti elastic scattering at 25 MeV [33], and it was found that a better description of the experimental data was obtained using the theoretical 50 Ti density distribution. Further details on elastic scattering will be discussed later in Sect.…”

“…Here I first focus on the angular distribution at E α = 25.0 MeV by Gubler et al [33] which is available from the EXFOR database [46]. This angular distribution covers the full angular range from about 22…”