Shape Coexistence in Isotopes from Oxygen to Calcium
- PDF / 1,032,767 Bytes
- 5 Pages / 595.22 x 842 pts (A4) Page_size
- 103 Downloads / 145 Views
Shape Coexistence in Isotopes from Oxygen to Calcium Eun Jin In Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea
Youngman Kim∗ and Panagiota Papakonstantinou Rare Isotope Science Project, Institute for Basic Science, Daejeon 34000, Korea
Seung-Woo Hong Department of Physics, Sungkyunkwan University, Suwon 16419, Korea (Received 29 September 2020; revised 6 October 2020; accepted 7 October 2020) We study structural features in the ground states of isotopes from O to Ca in the framework of the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) with the PC-PK1 density functional. Focusing on nuclear shapes, we survey our results for candidates of shape coexistence and propose potential candidate isotopes. We expect that some of the proposed candidates could be accessible by RAON in its early stage. Keywords: Shape coexistence, Light nucleus, RAON DOI: 10.3938/jkps.77.966
I. INTRODUCTION Nuclear theory for rare isotopes should be timely developed to face new precise observables from forthcoming rare isotope facilities such as RAON (Rare Isotope Accelerator complex for ON-line experiments) [1–3] which can produce exotic nuclei near the nucleon drip line. Exotic nuclei exhibit many interesting phenomena such as the change of magic number, shape coexistence, giant halo, shape decoupling between core and halo [4]. A serious challenge to nuclear theory is to develop tools to reliably calculate and understand the properties of exotic nuclei and unknown properties from the new observables. A modern theoretical tool, which can investigate the properties of most nuclei in the nuclear chart, is density functional theory. Relativistic mean field theory is one of the methods to obtain nuclear energy density functionals. Covariant density functional theory [5–8] has been developed to study nuclear properties such as the nuclear mass, binding energy and radius. In the early stage of RAON, we expect relatively light exotic nuclei could be produced. In preparation for the early stage of RAON, we currently focus on even-even isotopes from Oxygen to Calcium within covariant density functional theory. We adopt the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) [9,10], which self-consistently takes into account pairing and the continuum, as well as the axial deformation degrees of freedom, with the successful PC-PK1 density ∗ E-mail:
functional [11] to study extensively features of even-even nuclei in the range from Z = 8 to Z = 20. To investigate deformation of a nucleus we assume axial symmetry, but take into account even multipoles higher than quadrupole. Among the many interesting features of exotic nuclei, we focus on shape coexistence in this work. The shape of a nucleus is one of its most fundamental properties. Understanding shape coexistence could shed light on the underlying mechanism how nucleons form a nucleus. For details on shape coexistence we refer to Refs. 12,13, and for a recent experimental result of shape coexistence in 110,112 Cd we refer to Ref. 14.
I
Data Loading...
