Conveners
Thursday - Session 1: Explosive Stellar Objects and Nuclear Physics : Explosive Hydrogen Burning I
- Hidetoshi Yamaguchi (Center for Nuclear Study, University of Tokyo)
Accreting neutron stars show a broad range of observable phenomena that probe the properties of neutron stars. These phenomena are powered by nuclear reactions of proton-rich and neutron-rich unstable isotopes and include various types of X-ray bursts as well as the cooling neutron star crust in transiently accreting systems. Burst and crust observables are linked as the ashes of bursts...
During type I X-ray bursts, the rapid-proton capture (rp-) process has to pass through the NiCu cycles and ZnGa cycles before reaching the region above germanium and selenium isotopes that hydrogen burning occurs in. According to the sensitivity study by Cyburt et al. (2016), the $^{57}$Cu(p,$\gamma$)$^{58}$Zn reaction located in the NiCu cycles is the fifth important rp-reaction influencing...
The 18Ne(α,p)21Na reaction is one candidate of the breakout reactions from hot-CNO cycle, and it plays an important role in understanding the X-ray bursts and the nucleosynthesis in the rp-process. We investigated energy levels of the compound nucleus 22Mg by measuring the 18Ne(α,α)18Ne resonant scattering in inverse kinematics. The 18Ne rare isotope beam was produced at the CNS Radio-Isotope...
In this work, we re-assess the $^{65\!\!}$As(p,$\gamma$)$^{66\!}$Se reaction rates based on a set of proton thresholds of $^{66\!}$Se, $S_\mathrm{p}$($^{66\!}$Se), estimated from the experimental mirror nuclear masses, theoretical mirror displacement energies, and full $p\!f$-model space shell-model calculation. The mirror displacement energies with much reduced uncertainty of the...
The 26Al abundance holds a special role in present-day astrophysics, since it is a probe of active nucleosynthesis in the Galaxy and a valuable constraint of Galactic core-collapse supernovae rate. It is estimated through the detection of the 1809-keV γ-line of the daughter 26Mg and from the superabundance of 26Mg in comparison with the most abundant 24Mg isotope in meteorites. Accurate...