1 / 14

Study of A=6 System by Complex-Scaled 4 He+N+N Model

Study of A=6 System by Complex-Scaled 4 He+N+N Model. Nozomi Kurihara Division of Physics, Graduate School of Science, Hokkaido University. Collaborators Yuma Kikuchi and Kiyoshi Kato Division of Physics, Graduate School of Science, Hokkaido University.

baina
Download Presentation

Study of A=6 System by Complex-Scaled 4 He+N+N Model

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Study of A=6 System by Complex-Scaled 4He+N+N Model Nozomi Kurihara Division of Physics, Graduate School of Science, Hokkaido University Collaborators Yuma Kikuchi and Kiyoshi Kato Division of Physics, Graduate School of Science, Hokkaido University

  2. Introduction –overview of A=6 nuclei– • spherical • described by the mean-field model General nuclei for example, 16O, 40,48Ca, 58Ni, etc…

  3. Introduction –overview of A=6 nuclei– • strongly bound a particle • loosely bound two valence nucleons • cannot described by the mean-field model A=6 nuclei 6He 6Li 6Be a+d two-body a+n+p three-body two-neutron halo di-proton? • described by the three-body cluster model

  4. Introduction –overview of A=6 nuclei– Energy level diagram of A=6 nuclei the lowest thresholds bound states resonant states There are lots of resonant states • Complex-Scaling Method (CSM) Ref : D. R. Tilley, et al., Nucl. Phys. A708(2002), 3-163

  5. Introduction –overview of A=6 nuclei– a+n+p three-body resonant pole Complex-Scaling Method (ex : the 2+ state of 6Li) a+d two-body The resonant energy and the width obtained by the CSM

  6. Introduction –overview of A=6 nuclei– • known as a two-neutron halo nucleus • di-neutron correlation • 6Be • candidate for the two-proton decay • di-proton correlation 6He • three-body cluster structure for T=1 states (isobaric analog states) • two-body cluster structure for T=0 states • 6Li Three-body cluster structure or two-body cluster structure?

  7. Introduction –for 6He– • Di-neutron correlation has been suggested theoretically, and investigated experimentally using a Coulomb breakup reaction. di di-neutron cigar-like

  8. Introduction –for 6Be– • 6Be ground state can decay with the direct two-proton decay process [1]. [1] : L. V. Grigorenko et al., Phys. Rev. C 80, 034602 (2009)

  9. Introduction –for 6Li– • The ground state and the T=0 resonance states is investigated by the two-body cluster model [2]. • The two-body cluster model cannot explain the T=1 resonance states. • The three-body cluster model is needed [3]. T=0 T=1 a+dtwo-body a+n+p three-body [2] : Y. Sakuragi, et al., Prog. Theor. Phys. Suppl. 89(1986), 136 [3] : V.I. Kukukin, et al., Nucl. Phys. A 586(1995),151

  10. In this research • Calculate the energies and the widths for the ground states and the lowly-excited states of A=6 nuclei with Complex-Scaled 4He+N+N model. • Using the method of Analytic Continuation in the Coupling Constant (ACCC), calculate the resonance energy and the widths of the 1+2 state of 6Li with higher accuracy. • Discuss the decay process of the ground states of each nuclei.

  11. Method • Hamiltonian [4] Hybrid-TV model [5] + ECM (T-type) COSM (V-type) [4] : H. Kanada, et al., Prog. Theor. Phys. 61(1979), 1327 [5] : S. Aoyama, et al., Prog. Theor. Phys. 93(1995), 99

  12. Results Energy level diagrams for A=6 nuclei (6He, 6Be) [6] [6] • Matter radius for 6He ground state [7] [6] : D. R. Tilley, et al., Nucl. Phys. A708(2002), 3-163 [7] : I.Tanihata, et al., Phys. Lett. B. 206(1988), 592

  13. Results Energy level diagrams for A=6 nuclei (6Li) [6] [6] : D. R. Tilley, et al., Nucl. Phys. A. 708(2002), 3-163

  14. Summary We calculate the energies and the widths of the ground states and the lowly-excited states of A=6 nuclei using the Complex-Scaled 4He+N+N Model. Future Work • Obtain the energy of the 1+2 state of 6Li with the Complex-Scaled 4He+N+N Model.

More Related