Conveners
Wednesday - Session 1: Explosive Stellar Objects and Nuclear Physics: r process - I
- Myung-Ki Cheoun (Department of Physics, Soongsil University)
The astrophysical rapid neutron capture (r-) process is thought to be responsible for the production of all of the observed thorium, uranium and plutonium in the cosmos. While nuclear data is continually being produced by radioactive beam facilities, many properties of the heaviest nuclei remain unmeasured. Thus, simulations of the r-process must rely on theory models that can be extrapolated....
There is a growing consensus in recent multi-messenger astronomy that the neutron star merger (NSM) as well as core collapse supernova (CCSN) and collapsar (which is very massive single star collapsing to a black hole) could be a possible site for the r-process nucleosynthesis. We will first discuss when and how these three astrophysical sites have contributed to enrichment of the r-process...
The astrophysical sites where 𝑟-process elements are synthesized remain mysterious: it is clear that neutron-star-mergers (kilonovae, KNe) contribute, and some classes of core-collapse supernovae (SNe) are also possible sources of at least the lighter 𝑟-process species. The discovery of 60Fe on the Earth and Moon implies that one or more astrophysical explosions have occurred near the Earth...
The light heavy elements between strontium and silver, can be synthesized in a primary process in either neutron- (weak r-process) or proton-rich (νp-process) neutrino-driven outflows of explosive environments [1]. Constraining the nuclear physics uncertainties, for example the (α,xn) reaction rates in the weak r-process [2,3], allows us to investigate the conditions that create the light...
Study of bulk properties of nuclear matter in general, and of the fission-fragment mass distribution (FFMD) in particular, is important for understanding of nuclear abundances in astrophysical processes. More specifically, the structure and composition of the FFMD is relevant for the description of abundances of elements within the 110$\le$A$\le$170 mass range in the neutron star merger...
