B 10 + α reactions at low energies

作者：A. Gula, R. J. deBoer, Sérgio Luiz Cruz Aguilar, Jose A. Gutierrez del Arroyo, C. Boomershine, B. Frentz, J. Görres, S. L. Henderson, R. Kelmar, Sean McGuinness, Khachatur V. Manukyan, S. Moylan, D. Robertson, C. Seymour, Shahina, E. Stech, Wanpeng Tan, John Wilkinson, M. Wiescher · 发表于：Physical Review C · 年份：2023 · DOI：10.1103/physrevc.107.025805 · 被引用次数：4 · 研究领域：Nuclear physics research studies、Astronomical and nuclear sciences、Nuclear Physics and Applications

Nucleosynthesis in primordial stellar environments may lead to a substantial production of $^{10}\mathrm{B}$ isotopes, which either are converted by the $^{10}\mathrm{B}(p,\ensuremath{\alpha})^{7}\mathrm{Be}$ reaction to $^{7}\mathrm{Be}$ or processed further by $^{10}\mathrm{B}+\ensuremath{\alpha}$ reactions towards the carbon, nitrogen, and oxygen range. This paper focuses on low energy studies of the $^{10}\mathrm{B}(\ensuremath{\alpha},p)^{13}\mathrm{C}$ and $^{10}\mathrm{B}(\ensuremath{\alpha},d)^{12}\mathrm{C}$ reactions to determine the low energy cross section and the reaction rates in stellar environments using $R$-matrix analysis techniques. The experimental results cover a broad energy range, from 0.21 MeV up to 1.4 MeV in the center of mass frame, extending down to the Gamow energy range. A substantial increase in the reaction rate compared to previous predictions is found, due to the identification of near threshold $\ensuremath{\alpha}$-cluster resonance structures.