17–22 Sept 2023
Asia/Seoul timezone

Study of two missing states of 19Ne affecting the 18F(p,α)15O reaction rate in classical novae

22 Sept 2023, 14:45
15m
Oral Novae and X-ray bursts Nuclear properties for astrophysics

Speaker

D. KIM (Center for exotic nuclear studies, Institute Basic Science)

Description

Knowledge of the 19Ne resonance information near the proton threshold (Ex=6.410 MeV) is important for studying the 18F(p,α)15O nuclear reaction rate in a classical nova [1-4]. Several states in the vicinity of the proton threshold still have not been observed in 19Ne but were predicted by assuming isospin symmetry from its mirror state in 19F [5,6]. The α-elastic scattering experiment in a Thick Target Inverse Kinematics method (TTIK) was performed at RIKEN using the CNS RI Beam separator (CRIB) with a 15O radioactive beam for investigating the 19Ne level structure [7,8]. Two missing states were identified near the proton threshold, and one of the missing states affects the 18F(p,α)15O reaction rate. Additionally, the candidates of rotational bands for the alpha cluster structure were measured. Experimental details and results will be discussed in the presentation.
[1] J. Jose et al., Eur. Phys. J. A 27, 107 (2006).
[2] A. Coc et al., Astron. and Astrophys. 357, 561 (2000).
[3] K. Chae et al., Phys. Rev. C 74, 012801 (2006).
[4] D. Kahl et al., Astron. and Astrophys. 653. A64 (2021).
[5] N. C. Shu et al., Phys. Rev. C 58, 1354 (1998).
[6] C. D. Nesaraja et al., Phys. Rev. C 75, 055809 (2007).
[7] Y. Yanagisawa et al., Nucl. Instrum. Methods Phys. Res. A 539, 74 (2005).
[8] H. Yamaguchi et al., Nucl. Instrum. Methods Phys. Res. A. 589, 150 (2008).

Primary authors

D. KIM (Center for exotic nuclear studies, Institute Basic Science) K. I. HAHN (Center for Exotic Nuclear Studies, IBS)

Co-authors

Prof. A. A. CHEN (Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada) A. KIM (Korea University) D. KAHL (Extreme Light Infrastructure – Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering(IFIN-HH)) Ms E. J. LEE (Department of Physics, SungKyunKwan University) Ms E. K. LEE (Center for Underground Physics (CUP), Institute for Basic Science (IBS)) G. W. KIM (Center for Underground Physic, IBS / Ewha Womans University) H. YAMAGUCHI (Center for Nuclear Study, the University of Tokyo) Mr J. H. LEE (Department of Physics, SungKyunKwan University) Dr J. Y. MOON (Institute for basic science) K. ABE K. Y. CHAE (Sungkyunkwan University) M. S. GWAK (RISP, IBS) Dr N. IMAI (Center for Nuclear Studies, University of Tokyo, Tokyo, Japan) Prof. N. IWASA (Department of Physics, University of Tohoku) Mr N. KITAMURA (Center for Nuclear Studies, University of Tokyo, Tokyo, Japan) Ms O. BELIUSKINA (Center for Nuclear Study, University of Tokyo) Dr S. H. BAE (Center for Exotic Nuclear Studies, Institue for Basic Science) Prof. S. H. CHOI (Seoul National University) S. HAYAKAWA (Center for Nulear Study, University of Tokyo) Dr S. KUBONO (RIKEN Nishina Center) S. M. CHA (Center for Exotic Nuclear Studies) Dr S. W. HONG (Heavy-Ion Accelerator Research Institute, Institute for Basic Science) Dr S. Y. PARK (Center for Underground Physics (CUP), Institute for Basic Science (IBS)) Dr V. PANIN (RIKEN, Nishina Center) Mr Y. SAKAGUCHI (Center for Nuclear Study, University of Tokyo) Dr Y. WAKABAYASHI (RIKEN, Nishina Center)

Presentation materials