Role of consistent parameter sets in an assessment of the alpha-particle optical potential below the Coulomb barrier
| Autor: | Avrigeanu, V., Avrigeanu, M. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. C 99, 044613 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.99.044613 |
| Popis: | Background: Further studies of high-precision measurements of alpha-induced reaction data below the Coulomb barrier have still raised questions about the alpha-particle optical model potential (OMP) within various mass ranges, i.e. for 64Zn, 108Cd, 113,115In, 121,123Sb, and 191,193Ir target nuclei. Purpose: The accuracy as well as eventual uncertainties and/or systematic errors of using a previous optical potential are much better considered by analysis of such accurate data. Method: Statistical model (SM) calculations of the (alpha,x) reaction cross sections have been carried out using model parameters which were previously obtained by analyzing independent data, particularly gamma-ray strength functions, and taking into account their uncertainties and questions of extrapolation for nuclei without similar data. Results: Consistent description of the recent alpha-induced reaction data is provided by the above-mentioned optical potential with no empirical rescaling factors of either its own parameters or the gamma and/or nucleon widths. Effects of still uncertain SM parameters on calculated alpha-induced reaction cross sections and conclusions on the alpha-OMP can be now discussed due to unprecedented precision of the new data. Conclusions: The alpha-particle optical potential has been confirmed at incident energies below the Coulomb barrier using statistical-model parameters validated through a former analysis of independent data. Comment: 14 pages, 6 figures |
| Databáze: | arXiv |
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