Title: A
New Approach in Nuclear Physics to Understand the Origin of Elements in the
Universe
일시 : 2022년 3월 22일(화), 17시
Speaker: 안성훈(IBS)
Abstract : Two
important open questions addressed in the 2015 Long Range Plan for US Nuclear
Science are ``Where do nuclei and elements come from?'' and ``What combinations
of neutrons and protons can form a bound atomic nucleus?'' Their answers are crucial for both nuclear
structure and astrophysics, gaining our knowledge about modern nuclear theory
and the evolution of our Universe. Moreover, with the recent astonishing
observation of the first neutron star merger by astronomers, understanding
nuclear spectroscopic properties of short-lived nuclei has become very
important to demonstrate outcomes of the event such as gamma-ray, optical and X-ray emissions.
However, our knowledge of rare isotopes involved in nucleosynthesis processes,
such as the rapid proton capture process (rp-process) and the rapid neutron
capture process (r-process), still lags behind the precision at which the
observations have been made.
In order to
answer the questions, new experimental studies of nuclear properties with heavy
ion radioactive beam accelerators are critical. Moreover, because most of key
nuclei allowing us to explore new models of nuclear structure are far from
stability, it is only possible to perform the research with powerful rare
isotope beam(RIB) facilities, including National Superconducting Cyclotron
Laboratory, Oak Ridge National Laboratory, CARIBU at Argonne National Laboratory,
MARS at Texas A&M University Cyclotron Institute, which provide short-lived
radioactive beams. Furthermore, new generation RIB accelerator facilities
around the world will be available soon, such as Radioactive Isotope Beam
Factory (RIBF) in Japan, Facility for Rare Isotope Beam (FRIB) in the US and
Rare isotope Accelerator complex for ON-line experiment (RAON) in South Korea.
Recent experimental studies of key nuclei performed at the existing facilities will be presented as well as new active research activities at the Center for Exotic Nuclear Studies (CENS), Institute for Basic Science (IBS). Future plans how to take advantage of the new facilities including RAON will also be addressed.