C. Mănăilescu | Searcharxiv

arXiv2016

Comment on "Solution of the $α$-Potential Mystery in the $γ$ Process and Its Impact on the Nd/Sm Ratio in Meteorites"

A competition of the low-energy Coulomb excitation (CE) with the compound nucleus (CN) formation in $α$-induced reactions below the Coulomb barrier has been assumed by Rauscher [Phys. Rev. Lett. 111, 061104 (2013)] in order to use the same optical model (OM) potential for description of the latter and the alpha-particle emission as well. In this Comment we show that the corresponding partial waves and integration radii provide evidence for the distinct account of the CE cross section and OM total-reaction cross section.

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arXiv2014

Further explorations of the alpha-particle optical model potential at low energies for the mass range A=45-209

The recent high-precision measurements of alpha-particle induced reaction data below the Coulomb barrier (B) make possible the understanding of limits and possible improvement of a previous optical model potential (OMP) for alpha-particles on nuclei within the mass number range 45 130. Moreover, underestimation of reaction cross sections for well-deformed nuclei is removed by using ~7% larger radius for the surface imaginary part of this spherical OMP. Improved input parameters based on recent independent data, particularly gamma-ray strength functions, but no empirical rescaling factor of the gamma and/or neutron widths have been involved within statistical model calculation of the corresponding (alpha,x) reaction cross sections.

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