1 / 21

within the complex EXCITED VAMPIR approach

EXOTIC NUCLEAR STRUCTURE PHENOMENA IN MEDIUM MASS NUCLEI. O. RADU 1 , A. PETROVICI 1,2 , K.W. SCHMID 2 , A. FAESSLER 2. 1 Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest,Romania 2 Institut f ü r Theoretische Physik, Universit ä t T ü bingen, Germany. within

Download Presentation

within the complex EXCITED VAMPIR approach

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. EXOTIC NUCLEAR STRUCTURE PHENOMENA IN MEDIUM MASS NUCLEI O. RADU1, A. PETROVICI1,2, K.W. SCHMID2, A. FAESSLER2 1 Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest,Romania 2 Institut für Theoretische Physik, Universität Tübingen, Germany within the complex EXCITED VAMPIR approach

  2. Variational approaches to the nuclear many-body problem using symmetry-projected Hartree-Fock-Bogoliubov configurations General theoretical tools • the model space is defined by a finite set of spherical single particle states • the effective many-body Hamiltonian is represented as a sum of one- and two-body terms • the basic building blocks are HFB vacua, only restricted by time-reversal and axial symmetry • the HFB transformations are essentially complex and allow proton-neutron and parity mixing • the broken symmetries are restored by projection techniques (s = N, Z, I, ) O.Radu – NNPSS, Tallahassee 2007

  3. O.Radu – NNPSS, Tallahassee 2007

  4. O.Radu – NNPSS, Tallahassee 2007

  5. O.Radu – NNPSS, Tallahassee 2007

  6. Variationalprocedures complex Vampir approach O.Radu – NNPSS, Tallahassee 2007

  7. complex Excited Vampir approach O.Radu – NNPSS, Tallahassee 2007

  8. A= 50 – 90 mass region O.Radu – NNPSS, Tallahassee 2007

  9. Nucl. Phys. A770 (2006) 107 J. Phys. G: Nucl.Part.Phys.32(2006) 583 Shape coexistence effects in 78Kr O.Radu – NNPSS, Tallahassee 2007

  10. O.Radu – NNPSS, Tallahassee 2007

  11. O.Radu – NNPSS, Tallahassee 2007

  12. xp Q(2+1)= -61(3) efm2 Q(2+2)= +44(6) efm2 O.Radu – NNPSS, Tallahassee 2007

  13. O.Radu – NNPSS, Tallahassee 2007

  14. Exp. g(2+1)=0.43(3) g(2+2)=0.54(10) g(4+1)=0.46(7) small effective g-factors at spins 8+, 10+, 12+ O.Radu – NNPSS, Tallahassee 2007

  15. 2exp(E0;0+2 0+1)=0.047(13) ; 2EXV(E0;0+3 0+1)=0.017 O.Radu – NNPSS, Tallahassee 2007

  16. Eur. Phys. J. A28 (2006) 19 Magnetic bands in 82Rb O.Radu – NNPSS, Tallahassee 2007

  17. O.Radu – NNPSS, Tallahassee 2007

  18. O.Radu – NNPSS, Tallahassee 2007

  19. O.Radu – NNPSS, Tallahassee 2007

  20. O.Radu – NNPSS, Tallahassee 2007

  21. Summary and outlook • the shape coexistence and the variable oblate-prolate mixing with increasing spin and excitation energy could explain the irregularities observed at low, intermediate and high spins • the forking observed at the highest identified spins is determined by a high density of strongly mixed configurations • the calculated electromagnetic properties agree with the available data • an alternative mechanism to the shears bands able to describe microscopically the phenomenon in the A~80 mass region is provided • the experimental trend is produced by an increased mixing of differently deformed • states at the highest calculated spins • the description of the exotic phenomena in medium mass nuclei requires very large many-nucleon model spaces • considerable effort has to be devoted deriving improved effective interaction O.Radu – NNPSS, Tallahassee 2007

More Related