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Title: Exotic structure in light neutron-rich nuclei

In this presentation I discussed two subjects. One is the persistence of threefold symmetry in the ground state of {sup 12}C. Recently D{sub 3h} symmetry has been established in {sup 12}C, which reflects the geometric symmetry of the three α particles. Although the spin-orbit interaction plays a significant role and this interaction breaks the α clusters, we show that threefold symmetry of {sup 12}C is still there. We use AQCM approach and discuss that inclusion of spin-orbit interaction, which is absent in the conventional microscopic α cluster models, is possible keeping the threefold symmetry. The second subject is the appearance of rod shape in C isotopes, which has been investigated in the framework of the cranking covariant density functional theory. The relationship between the stability of such states and the spin and isospin degrees of freedom is discussed; adding valence neutrons and rotating the system. These two effects stabilize the rod shape, and in addition, their coherent effect has been found; the σ-orbits (parallel to the symmetry axis) of the valence neutrons, which enhances the rod shape, is lowered by the rotation of the system, and this σ-orbit pulls down the single particle energies of protons with linear configuration owingmore » to the proton-neutron interaction effect.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
  2. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  3. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China)
  4. Department of Physics, Kyoto University, Kitashirakawa Oiwake-Cho, Kyoto 606-8502 (Japan)
  5. Matsue College of Technology, Matsue, Shimane 690-8518 (Japan)
Publication Date:
OSTI Identifier:
22492447
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1681; Journal Issue: 1; Conference: Nuclear Structure and Dynamics '15: 3. international nuclear physics conference on nuclear structure and dynamics, Portoroz (Slovenia), 14-19 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALPHA PARTICLES; CARBON 12; CLUSTER MODEL; CONFIGURATION; DEGREES OF FREEDOM; DENSITY FUNCTIONAL METHOD; GEOMETRY; GROUND STATES; ISOSPIN; L-S COUPLING; NEUTRON-RICH ISOTOPES; NEUTRONS; ORBITS; PROTON-NEUTRON INTERACTIONS; PROTONS; ROTATION; SPIN; SYMMETRY; VALENCE