energy density functional description of nuclear spectrum and shape transition
Download
Skip this Video
Download Presentation
Energy Density Functional Description of Nuclear Spectrum and Shape Transition

Loading in 2 Seconds...

play fullscreen
1 / 30

Energy Density Functional Description of Nuclear Spectrum and Shape Transition - PowerPoint PPT Presentation


  • 81 Views
  • Uploaded on

第十四届全国核结构大会暨第十次全国核结构专题讨论会 湖州, 2012 年 4.12-16. Energy Density Functional Description of Nuclear Spectrum and Shape Transition. 李志攀 西南大学物理科学与技术学院. 1. 4. 2. 3. Introduction. Results and discussion. Summary. Theoretical framework. Outline. Nuclear Low-lying Spectrum.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Energy Density Functional Description of Nuclear Spectrum and Shape Transition' - keon


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
energy density functional description of nuclear spectrum and shape transition

第十四届全国核结构大会暨第十次全国核结构专题讨论会第十四届全国核结构大会暨第十次全国核结构专题讨论会

湖州,2012年4.12-16

Energy Density Functional Description of Nuclear Spectrum and Shape Transition

李志攀

西南大学物理科学与技术学院

outline

1

4

2

3

Introduction

Results and discussion

Summary

Theoretical framework

Outline
nuclear low lying spectrum
Nuclear Low-lying Spectrum
  • Nuclear low-lying spectrum is an important physical quantity that can reveal rich structure information of atomic nuclei
    • Shape and shape transition

9-

8+

7-

5-

6+

3-

4+

1-

2+

0+

nuclear low lying spectrum1
Nuclear Low-lying Spectrum
  • Nuclear low-lying spectrum is an important physics quantity that can reveal rich structure information of atomic nuclei
    • Shape and shape transition
    • Evolution of the shell structure

T. Baumann

Nature06213(2007)

Z

N=28

N=20

N

N=16

nuclear low lying spectrum2
Nuclear Low-lying Spectrum
  • Nuclear low-lying spectrum is an important physics quantity that can reveal rich structure information of atomic nuclei
    • Shape and shape transition
    • Evolution of the shell structure
    • Evidence for pairing correlation
covariant energy density functional cedf
Covariant Energy Density Functional (CEDF)

Ring96, Vretenar2005, Meng2006

  • CEDF: nuclear structure over almost the whole nuclide chart
    • Scalar and vector fields: nuclear saturation properties
    • Spin-orbit splitting
    • Origin of the pseudo-spin symmetry
    • Spin symmetry in anti-nucleon spectrum
    • ……
  • Spectrum: beyond the mean-field approximation
    • Restoration of broken symmetry, e.g. rotational
    • Mixing of different shape configurations

AMP+GCM: Niksic2006, Yao2010

PES

5D Collective Hamiltonian based on CEDF

slide7

Brief Review of the model

Coll. Potential

Moments of inertia

Mass parameters

Diagonalize:

Nuclear spectroscopy

T. Niksic, Z. P. Li, D. Vretenar, L. Prochniak, J. Meng, and P. Ring 79, 034303 (2009)

slide8

Interesting topics

  • Microscopic Analysis of nuclear QPT
  • Fission barrier and SD band
  • Shape evolution in N=28 isotones
  • Effect of the time-odd mean-field
nuclear quantum phase transition qpt 1 st order
Nuclear Quantum Phase Transition(QPT) - 1st order

Critical

E

  • Nuclear QPT
  • Two approaches to study

QPT

Spherical

Potential

Order par.

β

Iachello, PRL2004

  • Method of Landau based on PES
  • Computation of order parameters

Deformed

first order qpt
First order QPT
  • Spectrum

... detailed spectroscopy has been reproduced well !!

first order qpt1
First order QPT
  • Characteristic features:

Sharp increase of R42=E(41)/E(21) and B(E2; 21→01) in the yrast band

X(5)

Li, Niksic, Vretenar, Meng. Lalazissis & Ring, PRC79,054301(2009)

Li, Niksic, Vretenar, &Meng. PRC80,061301(R) (2009)

Li, Niksic, Vretenar, & Meng. PRC81,034316 (2010)

fission barrier and sd band
Fission barrier and SD band
  • Extended 3DRMF+BCS to 3DRHB

Li, Niksic, Vretenar, Ring & Meng. PRC81,064321(2010)

slide13

Shape evolution & coexistence in N=28 isotones

E(21+)

B(E2)

http://www.nndc.bnl.gov/

shape evolution coexistence in n 28 isotones1
Shape evolution & coexistence in N=28 isotones

http://www-phynu.cea.fr

N=28

48Ca

44S

42Si

40Mg

shape evolution coexistence in n 28 isotones3
Shape evolution & coexistence in N=28 isotones

Prolate:Δp = 5.05 MeV

Oblate:Δn = 3.91 MeV

shape evolution coexistence in n 28 isotones5
Shape evolution & coexistence in N=28 isotones

C. Force et al., PRL105

  • Low-lying spectrum
shape evolution coexistence in n 28 isotones6
Shape evolution & coexistence in N=28 isotones
  • Low-lying spectrum

Li, Yao, Vretenar, Niksic, Chen & Meng, PRC84, 054304 (2011)

effect of time odd mean field
Effect of time-odd mean-field

P. Ring and P. Schuck, “The Nuclear Many-Body Problem”

  • The ATDHFB mass tensor
slide22

Effect of time-odd mean-field

  • The ATDHFB mass tensor
slide24

Effect of time-odd mean-field

  • Effect of time-odd mean-field on the spectrum

Z.P. Li et al. in preparation

slide25

Summary

  • Microscopic Collective Hamiltonian based on
  • CEDF has been developed
  • Application to the interesting topics
    • Nuclear QPT
    • Fission barrier and SD band in 240Pu
    • Shape evolution & coexistence in N=28 isotones
    • Effect of time-odd mean-field
slide26

Thank You !

J. Meng & JCNP group

D. Vretenar & T. Niksic

P. Ring

L. Prochniak

G. A. Lalazissis

J. M. Yao

ad