Spontaneous and induced fission of very heavy and super-heavy nuclei

Europe/Rome
Meeting room (ECT* - Villa Tambosi - Trento)

Meeting room

ECT* - Villa Tambosi - Trento

Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
Emanuele Vardaci (Università degli studi di Napoli), Nicolae Carjan (JINR Dubna & NIPNE-HH Bucharest), Yuri Oganessian (JINR Dubna)
Description

Spontaneous and induced fission of very heavy and super-heavy nuclei

In the 2nd semester of 2018 the Super Heavy Element Factory at JINR (Dubna) will deliver its first intense beam of 48Ca and experiments using a new gas filled separator and new detection modules will be carried out. The purpose is to study in details the nuclear, atomic and chemical properties of very heavy and superheavy elements with considerably improved statistics. Among the decay properties of these nuclei, particular attention will be given to nuclear fission.

In the same period the SPES facility, under development at the Laboratori Nazionali di Legnaro, Italy, is expected to enter the production stage of neutron-rich radioactive beams. With these beams the study of fission in unexplored regions of the nuclear chart will be possible, in particular in the region of very heavy neutron rich nuclei.

The main goal of the workshop is to discuss the state of the art of our present knowledge of fission and quasifission in the region of the very heavy and superheavy nuclei and to identify possible physics cases to be explored with the above two new facilities under development. These two facilities can play an extremely important and unique role in accessing, with different capabilities, unexplored regions of the nuclear chart, in particular the unknown neutron rich side. This area is particularly relevant because is of interest for the nucleosynthesis of the elements heavier that iron (r-process) and for the understanding of the existence and persistence of the shell closures. The latter are the main ingredient for the predicted survival of superheavy elements against fission.

Fundamental questions as well as unresolved problems will be on the agenda of the proposed workshop. For instance:

  1. How many protons and neutrons can a nucleus hold? Is the "Island of Stability" the last one?
  2. How does the strong Coulomb field and high nuclear density influence the fission and quasi fission processes?
  3. What controls the competition between alpha-decay and spontaneous fission?
  4. What influences most the fission half-lives: inertia, barrier height or barrier shape?
  5. Are there fission modes in the SF of nuclei with Z > 110?; is the most probable division symmetric or asymmetric?              

The Workshop is also intended to serve as a platform for proposals regarding experimental programs during the years of operation.

The program will be organized in such a way to favor open discussions between participants. The main structure will be introductory long invited talks (40 min) followed by long discussions (15 min). A balanced mix of theoretical and experimental topics will be carefully worked out to reach the main goal of the workshop.

To contribute to make the workshop successful, we propose to the invited speakers to review the existing theoretical and experimental results concerning fusion, fission and quasifission (such as fission barriers, half-lives, branching ratios, hindrance factors, mass and TKE distributions) and to focus on the study of fission and quasifission in unexplored regions of the nuclear chart, like the terra incognita or the new island of stability, which are of profound interest for the stellar nucleogenesis and for the understanding of the survival of the shell closures.

ECT*                  FBK                     ENSAR2

 

Secretariat - Ines Campo Organizer - Vardaci E.
    • 09:30 10:30
      Registration 1h Rustico Hall (ECT*)

      Rustico Hall

      ECT*

    • 10:30 11:00
      Welcome 30m Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
      Speaker: Emanuele Vardaci (Università degli studi di Napoli)
    • 11:00 12:40
      Session 1: Super-Heavy Elements Fission Decay Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: S. Hofmann

      Convener: Sigurd Hofmann (GSI, Darmstadt)
      • 11:00
        Fission of heaviest nuclei 50m
        Speaker: Dr Yuri Oganessian (JINR Dubna)
      • 11:50
        Predictions Fission Fragment Mass Distributions for Super-Heavy Elements 50m
        Speaker: Dr Nicolae Carjan (JINR Dubna & NIPNE-HH Bucharest)
    • 12:40 14:30
      Lunch 1h 50m Villa (ECT* canteen)

      Villa

      ECT* canteen

    • 14:30 17:20
      Session 2: Super-Heavy Decay Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: D. Poenaru

      Convener: Dorin Poenaru (Horia Hulubei National Institute, Bucharest)
      • 14:30
        Super-Heavy Nuclei:production and decay properties 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Peter Möller (LANL, Los Alamos)
      • 15:20
        Spontaneous Fission Properties of Super-Heavy Nuclei 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Fritz P. Heßberger (GSI, Darmstadt)
      • 16:10
        Coffee Break 20m Villa (ECT*)

        Villa

        ECT*

      • 16:30
        Alpha Decay and Fission of High-K Isomers 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Roderick Clark (LBNL, Berkeley)
    • 09:30 11:10
      Session 3: New Facilities 1 Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: K. Rykaczewski

      Convener: Krzysztof Rykaczewski (ORNL, Oak Ridge)
      • 09:30
        SHE-FACTORY: A New Facility for Super-Heavy Element Research 50m
        Speaker: Sergey Dmitriev (JINR, Dubna)
      • 10:20
        Impact of quasifission on SHE production 50m
        Speaker: Mikhail Itkis (JINR, Dubna)
    • 11:10 11:30
      Coffee Break 20m Villa (ECT*)

      Villa

      ECT*

    • 11:30 13:10
      Session 4: Multi-nucleon Transfer Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: G. Ter Akopian

      Convener: Gurgen Ter-Akopian (JINR, Dubna)
      • 11:30
        Production of neutron-rich heavy and super-heavy nuclei in multinucleon transfer reactions 50m
        Speaker: Alexander Karpov (JINR, Dubna)
      • 12:20
        Dynamical effects of superfluidity on multi-nucleon transfer, fusion and fission 50m
        Speaker: Guillaume Scamps (University of Tsukuba)
    • 13:10 14:30
      Lunch 1h 20m Villa (ECT* canteen)

      Villa

      ECT* canteen

    • 14:30 17:20
      Session 5: Reaction Mechanisms Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
      Convener: Emanuele Vardaci (Università degli studi di Napoli)
      • 14:30
        Symmetric, asymmetric and super-asymmetric modes in fission and quasifission of heavy and super-heavy nuclei 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Iulia Itkis (JINR, Dubna)
      • 15:20
        Microscopic studies of fission dynamics based on energy density functionals 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Dario Vretenar (University of Zagreb)
      • 16:10
        Coffee Break 20m Villa (ECT*)

        Villa

        ECT*

      • 16:30
        Time-dependent Density Functional Theory for nuclear reactions – advantages and disadvantages 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Piotr Magierski (Warsaw University)
    • 09:30 11:10
      Session 6: New Facilities 2 Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: M. Itkis

      Convener: Mikhail Itkis (JINR, Dubna)
      • 09:30
        Super-heavy Element Research at GSI 50m
        Speaker: Michael Block (GSI, Darmsdadt)
      • 10:20
        Fission Barriers of Super-Heavy Nuclei and Search for Element 120 50m
        Speaker: Sigurd Hofmann (GSI, Darmstadt)
    • 11:10 11:30
      Coffee Break 20m Villa (ECT*)

      Villa

      ECT*

    • 11:30 13:10
      Session 7: New Facilities 3 Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: S. Dmitriev

      Convener: Sergey Dmitriev (JINR, Dubna)
      • 11:30
        The SPES project at the INFN- Laboratori Nazionali di Legnaro 50m
        Speaker: Gianfranco Prete (Laboratori Nazionali di Legnaro)
      • 12:20
        Exotic nuclei and the SPES radioactive ion beam facility 50m
        Speaker: Giacomo de Angelis (Laboratori Nazionali di Legnaro)
    • 13:10 14:30
      Lunch 1h 20m Villa (ECT* canteen)

      Villa

      ECT* canteen

    • 14:30 17:40
      Session 8: Use of RIBs Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: M. Block

      Convener: Michael Block (GSI, Darmsdadt)
      • 14:30
        Contributions to the science program at the SHE Factory and SPES 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Krzysztof Rykaczewski (ORNL, Oak Ridge)
      • 15:20
        Radioactive ion beams for the fission study of the heaviest neutron-rich nuclei 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Gurgen Ter-Akopian (JINR, Dubna)
      • 16:10
        Coffee Break 20m Villa (ECT*)

        Villa

        ECT*

      • 16:30
        Secondary heavy ion beams as a tool for investigation of fusion mechanism 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Greg Chubarian (Cyclotron Lab, Texas A & M)
    • 09:30 11:10
      Session 9: More on Spontaneous Fission 1 Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: N. Carjan

      Convener: Dr Nicolae Carjan (JINR Dubna & NIPNE-HH Bucharest)
      • 09:30
        Theory of spontaneous fission of super heavy nuclei and its competitor decay modes 50m
        Speaker: Dorin Poenaru (Horia Hulubei National Institute, Bucharest)
      • 10:20
        Spontaneous Fission of SHE: A New Source of Insights into the Structure of Neutron-Rich Nuclei 50m
        Speaker: Christopher Zachary
    • 11:10 11:30
      Coffee Break 20m Villa (ECT*)

      Villa

      ECT*

    • 11:30 13:10
      Session 10: More on Spontaneous Fission 2 Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: P. Möller

      Convener: Peter Möller (LANL, Los Alamos)
      • 11:30
        Fission hindrance of heaviest high-K isomers 50m
        Speaker: Michal Kowal (NCBJ, Warsaw)
      • 12:20
        From instantons to spontaneous fission rates 50m
        Speaker: Janusz Skalski (NCBJ, Warsaw)
    • 13:10 14:30
      Lunch 1h 20m Villa (ECT* canteen)

      Villa

      ECT* canteen

    • 14:30 17:20
      Session 11: More on Spontaneous Fission 3 Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: A. Karpov

      Convener: Alexander Karpov (JINR, Dubna)
      • 14:30
        An instanton-motivated approach to the spontaneous fission of odd nuclei 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Wojciech Brodzińki (NCBJ, Warsaw)
      • 15:20
        Half-lives of nuclei around the super-heavy nucleus 304120 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: Ion Silisteanu
      • 16:10
        Coffee Break 20m Villa (ECT*)

        Villa

        ECT*

      • 16:30
        Probing the evolution of the fission modes with a microscopic approach 50m Meeting room

        Meeting room

        ECT* - Villa Tambosi - Trento

        Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
        Speaker: David Regnier (IPN, Orsay)
    • 09:30 11:10
      Session 12: Cluster Radioactivity Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

      Chair: D. Poenaru

      Convener: Dorin Poenaru (Horia Hulubei National Institute, Bucharest)
      • 09:30
        Correspondence between cluster radioactivity of and asymmetric fission of super-heavy nuclei 50m
        Speaker: Michal Warda (UMCS, Lublin)
      • 10:20
        Cluster emission in 294Og 50m
        Speaker: Zachary Matheson (Michigan State University)
    • 11:10 11:30
      Coffee Break 20m Villa (ECT*)

      Villa

      ECT*

    • 11:30 12:30
      White paper: Concluding Remarks Meeting room

      Meeting room

      ECT* - Villa Tambosi - Trento

      Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
    • 12:30 14:00
      Lunch 1h 30m Villa (ECT* canteen)

      Villa

      ECT* canteen

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