2025/07/24 by Kouichi Hagino, Uzawa, Kotaro, Hagino, Kouichi · 1 citation
Physics and Astronomy · #Astronomical and nuclear sciences #FOS: Physical sciences #Gamma-ray bursts and supernovae #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Solar and Stellar Astrophysics (astro-ph.SR)
paper · doi:10.48550/arxiv.2507.18065
openalex publication_date 2025/07/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
To determine the energy dependence of fusion cross sections at extremely low energies is crucial for various astrophysical processes. In the previous study by Jiang et al. [Phys. Rev. C75, 015803 (2007)], it was concluded that fusion cross sections for the 12C+12C system rapidly drop off as the energy decreases. We here re-examine this hindrance phenomenon. While the previous study fitted the logarithmic slope L(E) of fusion cross sections with a function of L(E)=A+B/En and searched the optimum value of A and B with n=1.5, we refit the data with the same function for L(E) but by releasing the restriction on n. We find that the optimum values of n significantly deviates from n=1.5, resulting in the absence of hindrance of fusion cross sections both in the 12C+12C and the 12C+13C systems.