SVIBOR - Project code: 1-03-235

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
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E-mail: ured@znanost.hr

SVIBOR

SVIBOR - Collecting Data on Projects in Croatia

Project code: 1-03-235


NUCLEAR STRUCTURE, CHAOS AND BOUNDARY FIELDS OF COMPUTATIONAL PHYSICS


Main researcher: PAAR, VLADIMIR (34485)


Assistants
Type of research: basic
Duration from: 01/01/91. to 01/01/97.
Papers on project (total): 109
Papers on project quoted in Current Contents: 50
Institution name: Prirodoslovno-matematički fakultet, Prirodoslovni odjeli, Zagreb (119)
Department/Institute: Physics Department / Department of theoretical Physics
Address: Bijenička 32
City: 10000 - Zagreb, Croatia
Communication
Fax: 432-525
Phone: 432-527
E-mail: VPAAR@phy.hr
E-mail: PAAR@MAHAZU.HAZU.HR
Summary: Generating function method (GFM) for exact treatment of spin dependent level density in very large fermion and boson configuration spaces is developed, applied to specific nuclei and model cases, and on this basis a new algebraic formula for spin-dependent level density is proposed. Numerical calculations of energy spectra, electromagnetic properties and transfer reactions are performed in the IBFFM model for odd-odd nuclei, and in a new model with one- and two-quasiparticle pairs coupled to interacting bosons for high-spin states in even-even nuclei; these theoretical results were compared with experimental data obtained in leading experimental laboratories to provide theoretical understanding of experimental features or to serve as guidelines in performing experiments. Microscopic foundation of dynamical symmetries in odd-odd nuclei was shown within IBFFM. A new approach to Coulomb excitation of nuclear slab and to collective nuclear dynamics is developed in the framework of relativistic mean field theory. Quantum chaos is investigated for boson and boson-fermion systems and for shell model systems involving isospin breaking, by calculating fluctuation measures. Chaotic features of classical dynamics underlying SU(3) dynamical symmetry were found. Numerical simulations for variety of multi-source neuromagnetic data were performed and detailed V1 and V2 retinotopy demonstrated. Nonlinear classical dynamics of one-dimensional models arising from robotics and ship theory are being investigated by computer simulations with a particular emphasize to a possible onset of quasiperiodicity and chaos.

Keywords: level densities,interacting boson model,IBFFM,nuclear spectra, nuclear electromagnetic properties,chaos,dynamical symmetries, neuromagnetic sources,regularity,quasiperiodicity,nonlinear robot model,numerical models in clinical gastroenterology,nonlinear ship model

Research goals: 1)Fundamental theoretical investigations of nuclear structure andnuclear level densities,in collaboration with experimental physicists performing experiments at the worlds leading laboratories in nuclear structure physics. Development of teoretical models and computer codes:interacting boson-fermion-fermion model, extended interacting boson model with inclusion of one- and two- broken quasiparticle pairs and Gaussian polynomial generating function combinatorial method. Fundamental investigations of quantum chaos associated with isospin symmetry and boson/boson-fermion dynamical symmetries. 2) Fundamental investigations of relativistic Coulomb push of a nuclear slab and of nuclear dynamics in the framework of relativistic time-dependent mean-field theory. 3) Investigations aimed at identification and characterization of multiple visual areas through the use of neuromagnetic measurements and validation of modeling assumptions via numericalsimulations. 4)Development of optimal usage of available distributed computer system in Croatia. 5) Computer simulation in clinical gastroenterology. 6)Investigations of classical dynamics (regular, quasiperiodic, chaotic) of one-dimensional robot- and ship- models. The results of investigations achieved so far have been publishedin 64 scientific publications; 34 of these are publications ininternational scientific journals which are represented inCurrent Contents. In these publications there are foreigncoauthors from 17 countries ( USA. Germany, Belgium, Ukrainia,The Netherlands, Switzerland, Latvia, Italy, Russian Federation,Austria, Hungary, Turkey, France, Romania, Bulgaria,UK, andCanada).

COOPERATION - PROJECTS


  1. Name of project: JF-996 Spin distribution,level density,IBFFM and quantum chaos
    Name of institution: U.S. National Science Foundation
    City: 20545 - Washington D.C., SAD

  2. Name of project: Experimental and theoretical investigations of nuclear structure of odd-even and even-even nuclei
    Name of institution: Institut fuer Kernphysik,FA Juelich
    City: W-5170 - Juelich, Njemačka

  3. Name of project: Investigation of odd-odd nuclei
    Name of institution: Institute for nuclear research of the Hungarian academy of sciences
    City: H-4001 - Debrecen, Madžarska

  4. Name of project: Microscopic description of nuclear collective states
    Name of institution: Institute for nuclear research of Bulgarian academy of sciences
    City: 1784 - Sofia, Bugarska

  5. Name of project: Theoretical and experimental methods in nuclear physics
    Name of institution: Institute for atomic physics
    City: Bucharest, Rumunjska

COOPERATION - INSTITUTIONS


  1. Name of institution: Institute for nuclear physics and theoretical physics
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: B-9000 - Ghent, Belgija

  2. Name of institution: Department of physics,University of Utrecht
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: NL-3508 - Utrecht, Nizozemska

  3. Name of institution: Physics Department,University of Fribourg
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: CH-1700 - Fribourg, Švicarska

  4. Name of institution: Physik Department,Technische Universitaet Muenchen
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: D-8046 - Muenchen, Njemačka

  5. Name of institution: Physics Institute,Latvian Academy of Sciences
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 229021 - Riga-Salaspils, Latvija

  6. Name of institution: Lawrence Livermore National Laboratory, University of California at Berkley
    Type of institution: State institute
    Type of cooperation: Joint project
    City: CA-94550 - Livermore, SAD

  7. Name of institution: Brookhaven National Laboratory
    Type of institution: State institute
    Type of cooperation: Joint project
    City: NY-11973 - Upton, SAD

  8. Name of institution: Institute for Nuclear Research
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 252028 - Kiev, Ukrajina

  9. Name of institution: ENEA, CRE E.Clementel
    Type of institution: State institute
    Type of cooperation: Joint project
    City: I-40138 - Bologna, Italija

  10. Name of institution: Joint Research Center,Central Bureau for Nuclear Measurements
    Type of institution: State institute
    Type of cooperation: Joint project
    City: B-2440 - Geel, Belgija

  11. Name of institution: Petersburg Nuclear Physics Institute, Russian Academy of Sciences
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 188350 - Gatchina, Russian Federation

  12. Name of institution: Nestec,Lab. de Physique
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: CH-1000 - Lausanne, Švicarska

  13. Name of institution: Institut Federal de Metrologie
    Type of institution: State institute
    Type of cooperation: Joint project
    City: CH_3084 - Wabern, Švicarska

  14. Name of institution: CERN,EP Division
    Type of institution: State institute
    Type of cooperation: Joint project
    City: CH-1211 - Geneva, Švicarska

  15. Name of institution: Oesterreichische Akademie der Wissenschaft
    Type of institution: State institute
    Type of cooperation: Joint project
    City: A-1090 - Wien, Austrija

  16. Name of institution: Institute of Nuclear Research of the Hungarian Academy of Sciences
    Type of institution: State institute
    Type of cooperation: Joint project
    City: H-4001 - Debrecen, Madžarska

  17. Name of institution: Institut fuer Kernphysik,Forschungszentrum Juelich
    Type of institution: State institute
    Type of cooperation: Joint project
    City: W-5170 - Juelich, Njemačka

  18. Name of institution: Institut fuer Kernchemie,Johannes-Gutenberg Universitaet Mainz
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: W-6500 - Mainz, Njemačka

  19. Name of institution: Institut fuer Radiumforschung und Kernphysik der Universitaet Wien
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: A-1090 - Wien, Austrija

  20. Name of institution: Nuclear Physics Division, U.S.Department of Energy
    Type of institution: State administration
    Type of cooperation: Joint project
    City: 20545 - Washington D.C., SAD

  21. Name of institution: Istanbul Technical University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Istanbul-Maslak, Turska

  22. Name of institution: Hungarian Academy of Sciences,Central Research Institute of Physics
    Type of institution: State institute
    Type of cooperation: Joint project
    City: Budapest, Hungary

  23. Name of institution: Programmgruppe Technik und Gesellschaft,Forschungszentrum Juelich
    Type of institution: State institute
    Type of cooperation: Joint project
    City: W-5170 - Juelich, Njemačka

  24. Name of institution: Institut Laue Langevin
    Type of institution: State institute
    Type of cooperation: Joint project
    City: F-38042 - Grenoble, Francuska

  25. Name of institution: Tennessee Technical University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: TN-38505 - Cookville, SAD

  26. Name of institution: Institute of Atomic Physics
    Type of institution: State institute
    Type of cooperation: Joint project
    City: Bucharest, Rumunjska

  27. Name of institution: Montgomery College
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Takoma Park Maryland, SAD

  28. Name of institution: Kernfysisch Versneller Instituut,University of Groningen
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Groningen, Nizozemska

  29. Name of institution: Joint Institute of Nuclear Research
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 141980 - Dubna, Ruska Federacija

  30. Name of institution: Bulgarian Academy of Sciences,Institut for Nuclear Research and Nuclear Energy
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 1784 - Sofia, Bugarska

  31. Name of institution: Mississippi State University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 39762 - Mississippi State, SAD

  32. Name of institution: Furman University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: SC-29613 - Greenville, SAD

  33. Name of institution: Oak Ridge Associated Universities
    Type of institution: State institute
    Type of cooperation: Joint project
    City: TN-38731 - Oak Ridge, SAD

  34. Name of institution: School of Physics,University of Sussex
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: Brighton, Velika Britanija

  35. Name of institution: Princeton University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: NJ-08544 - Princeton, SAD

  36. Name of institution: Yale University,Center for theoretical physics
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: CT-06511 - New Haven, SAD

  37. Name of institution: A.W. Wright Nuclear Structure Laboratory,Yale University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: CT-06511 - New Haven, SAD

  38. Name of institution: Chalk River Laboratories
    Type of institution: State institute
    Type of cooperation: Joint project
    City: K0J 1J0 - Chalk River, Kanada

  39. Name of institution: Tandem Accelerator Laboratory,McMaster University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: L8S 4K1 - Hamilton, Kanada

  40. Name of institution: University of Toronto
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: M5S 1A7 - Toronto, Kanada

  41. Name of institution: Laboratoire de Physique Nucleaire,Universite de Montreal
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: H3C 3J7 - Montreal, Kanada

  42. Name of institution: Biophysics Group, Los Alamos National Laboratory
    Type of institution: State institute
    Type of cooperation: Joint project
    City: NM-87545 - Los Alamos, SAD

  43. Name of institution: MEG Center,VA Medical Center
    Type of institution: State institute
    Type of cooperation: Joint project
    City: NM-87108 - Albuquerque, SAD

  44. Name of institution: MEE Division,Los Alamos National Laboratory
    Type of institution: State institute
    Type of cooperation: Joint project
    City: NM-87545 - Los Alamos, SAD

  45. Name of institution: Interna klinika,Sveučilišna bolnica Rebro
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  46. Name of institution: Radiološki odjel,Sveučilišna bolnica Rebro
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  47. Name of institution: Pedijatrijski odjel,Sveučilišna bolnica Rebro
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  48. Name of institution: Fakultet kemijskog inženjerstva i tehnologije
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  49. Name of institution: Sveučilišni računalni centar
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  50. Name of institution: Elektrotehnički fakultet
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  51. Name of institution: Nuclear research center of the Latvian academy of Sciences
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 229021 - Salaspils, Latvija

  52. Name of institution: Institut des Sciences Nucleaires,Universite Joseph Fourier
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: F-38042 - Grenoble, Francuska

  53. Name of institution: CSNSM IN2P3-CNRS
    Type of institution: State institute
    Type of cooperation: Joint project
    City: F-91405 - Orsay, Francuska

  54. Name of institution: Department of Physics, McMaster University
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: L8S 4K1 - Hamilton, Kanada

  55. Name of institution: Bruce B Nuclear Safety Department, Ontario Hydro
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: M5S 1A7 - Toronto, Kanada

  56. Name of institution: Department of Physics, University of Jyvaskyla
    Type of institution: University/Faculty
    Type of cooperation: Joint project
    City: SF-40351 - Jyvaskyla, Finska

  57. Name of institution: Institut Rugjer Bošković
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

OTHER ACHIEVEMENTS


  1. Name: metodika fizike
    Type of achievement: Teaching aids and educatio
    Authors: Vladimir Paar
Other information about the project.
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