The 1st IReNA-Ukakuren Joint Workshop “Advancing Professional Development in Nuclear Astrophysics and Beyond”

Session

Light Nuclei

29 Aug 2023, 09:30

Large Seminar Room (Subaru Building) (NAOJ (National Astronomical Observatory of Japan))

Conveners

Light Nuclei: Morning - 1

• Heshani Jayatissa (Los Alamos National Laboratory)

Light Nuclei: Morning - 2

• Azusa Inoue

Light Nuclei: Afternoon - 1

• There are no conveners in this block

41. Study of the contribution of the 7Be(d, p) reaction to the 7Li problem in the Big-Bang Nucleosynthesis

Azusa Inoue

29/08/2023, 09:30

Invited talk

Our research goal is to measure the cross-section of the 7Be(d, p) reaction in search of a solution/key to the cosmological 7Li problem (CLP). The CLP is the overestimation of primordial 7Li abundance in the standard Big Bang nucleosynthesis (BBN) model compared to observed abundances, a major unresolved problem in modern astrophysics. A recent theoretical BBN model emphasized that the...

9. Feasibility study for measuring the gamma-decay probability of the 3-1 state in 12C with deuteron inelastic scattering

Yuya Honda

29/08/2023, 10:10

Talk

The triple alpha (3α) reaction, which produces ${}^{12}$C from ${}^4$He, is one of the most important reactions in nucleosynthesis in the universe. In this reaction, resonance states of three α particles are generated as excited states of ${}^{12}$C. In most cases, these states decay back into three α particles, but a tiny fraction of them undergo radiative decay, leading them to the ground state of...

55. Studying the nucleosynthesis in explosive stellar environments

Heshani Jayatissa (Los Alamos National Laboratory)

31/08/2023, 11:00

Invited talk

Understanding the nucleosynthesis processes in various astrophysical scenarios such as x-ray bursts and supernovae involve the study of numerous capture reactions. A Type-I x-ray burst (XRB) is an explosion in a binary system of an accreting neutron star and a companion star. The dominant ($p,\gamma$) nucleosynthesis flow in XRBs is halted at several waiting point nuclei such as ${}^{22}$Mg,...

25. Cross section evaluation of the dependence of the mean field model on antisymmetrized molecular dynamics

Yuta Mukobara (Tokyo Institute of Technology)

31/08/2023, 11:40

Talk

${}^{12}$C-induced reactions at MeV order energy are of great importance not only in astronomical contexts but also in applications such as cancer treatment, thanks to recent advances in accelerator technology. However, there is no established standard calculation method for reactions involving heavy ions with higher mass numbers than alpha particles. Various computational codes employ a wide...

32. Unraveling the role of carbon-alpha reaction rate for radioactive nickel synthesis in pair-instability supernovae

Hiroki Kawashimo (The University of Tokyo, Komaba)

31/08/2023, 13:20

Talk

Pair-instability supernovae (PISNe) are phenomena that are the final fates of very massive stars with an initial mass ranging from 140 to 260 $M_{\odot }$. Unlike other supernovae, PISNe do not leave behind compact objects. Stellar evolution theory predicts that there is a gap in the distribution of black hole masses due to PISNe. Recent works suggested that the location of this gap may be...