Conveners
Friday - Session 1: Stellar Evolutions and Hydrostatic Burning Processes & Underground Nuclear Astrophysics
- Xiaodong Tang (Institute of Modern Physics, CAS)
Stellar evolution models or “The stellar evolution models and the critical nuclear reactions”
The 13C(a,n)16O reaction is the main neutron source for the slow-neutron-capture (s-) process in Asymptotic Giant Branch stars and for the intermediate (i-) process. Direct measurements at astrophysical energies in above-ground laboratories are hindered by the extremely small cross sections and vast cosmic-ray induced background. We performed the first consistent direct measurement in the...
12C+12C fusion reaction rate is essential for explosional phenomena, such as X-ray superbursts and type Ia supernovae, and the evolution of massive stars. However, it has significant uncertainties in low-energy regions. Experimentally, the cross sections are tiny due to the thick Coulomb barrier. Theoretically, treatments of the rearrangement in the fusion reactions, in which alpha and p decay...
The $^{12}$C/$^{16}$O abundance ratio is of prime importance to understand stellar evolution and energy generation in the universe. A tiny change in the abundance ratio can change an entire scenario of the stellar nucleosynthesis from carbon burning to the iron core in the last years of stellar life. Despite many experimental efforts in the last 50 years, none of the associated reactions like...