Cross-section measurements of radiative proton-capture reactions in Cd112 at energies of astrophysical interest
| Autor: | E. Malami, V. Lagaki, A. Kanellakopoulos, T. J. Mertzimekis, A. Zyriliou, P. Tsavalas, M. Lykiardopoulou, E. M. Assimakopoulou, A. Khaliel, A. Psaltis |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Physical Review C. 99 |
| ISSN: | 2469-9993 2469-9985 |
| Popis: | Reactions involving the group of nuclei commonly known as $p$ nuclei are part of the nucleosynthetic mechanisms at astrophysical sites. The $^{113}\mathrm{In}$ nucleus is such a case with several open questions regarding its origin at extreme stellar environments. In this paper, the experimental study of the cross sections of the radiative proton-capture reaction $^{112}\mathrm{Cd}(p,\ensuremath{\gamma})^{113}\mathrm{In}$ is attempted for the first time at energies lying inside the Gamow window with an isotopically enriched $^{112}\mathrm{Cd}$ target. Two different techniques, the in-beam $\ensuremath{\gamma}$-ray spectroscopy and the activation method, have been applied. The latter method is required to account for the presence of a low-lying $^{113}\mathrm{In}$ isomer at 392 keV having a half-life of $\ensuremath{\approx}100\phantom{\rule{0.28em}{0ex}}\mathrm{min}$. From the cross sections, the astrophysical $S$ factors and the isomeric ratios have been additionally deduced. The experimental results are compared to detailed Hauser-Feshbach theoretical calculations using talys and discussed in terms of their significance to the optical model potential involved. |
| Databáze: | OpenAIRE |
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