1 / 82

820 likes | 976 Vues

Relativistic description of Exotic Nuclei and Magnetic rotation. 孟 杰 Jie Meng. 北京大学物理学院 School of Physics/Peking U 兰州重离子加速器国家实验室核理论中心 HIRFL/Lanzhou 中国科学院理论物理研究所 Institute for Theor.Phys./AS. Contents. New Effective Interactions in RMF Nuclear matter and neutron star

Télécharger la présentation
## Relativistic description of Exotic Nuclei and Magnetic rotation

**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

**Relativistic description of Exotic Nuclei and Magnetic**rotation 孟 杰Jie Meng • 北京大学物理学院School of Physics/Peking U • 兰州重离子加速器国家实验室核理论中心 HIRFL/Lanzhou • 中国科学院理论物理研究所 Institute for Theor.Phys./AS**Contents**• New Effective Interactions in RMF • Nuclear matter and neutron star • Finite Nuclei and halos • SRHWS: replacement of HO basis • New Magic number in Super-heavy nuclei • Magnetic rotation and Chiral bands**Effective interaction for RMF**Start: simple models Incompressibility requires the self-coupling of : NL1 and NLSH etc. Follow the Dirac-Brueckner Theory / Instability at high density a) the self-coupling of : TM1 b) correct incompressibility: NL3 c) DD effective interactions (TW99,DD-ME1,) The problem for the correction of CM a) Phenomenological ( -3/4 41 A -1/3 , -17.2 A -0.2 ) b) Microscopically ( - 1/2MA < PCM 2 > ) So far, only in TM2 and DDME1, the correction of CM are better treated. Effective interaction with the microscopically correction of CM are needed. Extrapolation for low and high nuclear matter**Nonlinear & DD RMF Lagrangian density:**Nonlinear RMF DD RMF Five constraints**Equations of Motion for DD RMF :**Rearrangement terms:**Nuclear matter**The density dependencies of various effective interaction strengths in relativistic mean field are studied and carefully compared for nuclear matter. The corresponding influences of those different density dependencies are presented and discussed on mean field potentials, saturation properties of nuclear matter.**Properties for nuclear matter**TM2, TM1, NL2,NLSH**Density dependence of Interaction strengths in Nuclear**Matter**Neutron Star**The density dependencies of various effective interaction strengths in relativistic mean field are studied and carefully compared for neutron star. The corresponding influences of those different density dependencies are presented and discussed on mean field potentials, equations of state, maximum mass and corresponding radius in neutron star.**Neutron Star**Center density vs. masses Radius vs. masses**Finite Nuclei in DD RMF**New parameter sets for Lagrangian density, PK1, PK1r, PKDD are able to provide an excellent description not only for the properties of nuclear matter but also for the nuclei in and far from the valley of beta-stability with the center-of-mass correction included in a microscopic way.**Halos and Giant halos**Recent work on the existence of giant halo and hyperon halo in relativistic continuum Hartree-Bogoliubov (RCHB) theory is reviewed. Experimental support of giant halos in Na and Ca isotopes near the neutron drip line is discussed and the progress on deformed halo is presented.**巨晕**J.Meng and P. Ring, 《Physical Review Letters》80 (1998)460**The Exp. and calculated S2n by RCHB for Ca, Ni, Zr, Sn and**Pb isotopes J.Meng, et al.，《Physical Review》C 65 (2002 ) 41302(R) Giant Halos**Neutron halos in hyper Ca isotopes**Lu, et al., Euro. Phys. J . A17，19-24 (2003)**Hyper Nuclei 13CΛ13C 2Λ**Hyperon halo nuclei：13C3Λ Lu HF, and Meng JChin. Phys. Lett. 19 (12): 1775-1778 DEC 2002.**Existence of deformed halo ?**• Otsuka et al. have studied the structure of 11Be and 8B with a deformed Woods-Saxon potential considered quadrupole deformation as a free parameter adjusted to the data. T.Otsuka,A.Muta,M.Yokoyama,N.Fukunishi,and T.Suzuki,Nucl.Phys.A588, 113c(1995). • Based on a spherical one-body potential: the positions of experimental drip lines are consistent with the spherical picture;I.Tanihata,D.Hirata,and H.Toki, Nucl.Phys.A583,769 (1995). • Using the deformed single-particle model，the existence of the deformed halo is doubted ?T. Misu, W. Nazarewicz, S. Aberg, Nucl.Phys. A614 (1997) 44-70. nucl-th/9612016 : Deformed nuclear halos**Progress and Challenge**• Deformation and Continuum: (DRCHB) • Coupled channel equations in coordinate space • The formalism and code for DRCHB • For given pairing potential DRCHB works well • Full self-consistence is under construction…**Limits of present methods**RMF in Woods-Saxon basis • RMF in H.O. basis: unsuitable for exotic nuclei • In coordinate space: difficult for deformed nuclei**Development of SRHWS**RMF Theory - Shan-Gui Zhou, Jie Meng, Peter Ring, Phys.Rev.C Lagrangian where**RMF Theory: field equations**Dirac equations for nucleons K-G equations for mesons

More Related