Meetings in BLTP: 2002



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VI Research Workshop
Nucleation Theory and Applications

Dubna, Russia, April 4 - 28, 2002





General Information
Research workshops on Nucleation Theory and Applications have been organised at the Joint Institute for Nuclear Research in Dubna, Russia, since 1997 every year in April in close co-operation between the Department of Physics of the University of Rostock, Germany (Dr. Juern W. P. Schmelzer, Prof. Gerd Roepke) and the Bogoliubov Laboratory of Theoretical Physics, Dubna, Russia (Prof. Vyatcheslav B. Priezzhev, Dr. Vyatcheslav I. Zhuravlev, Mrs. Galina G. Sandukovskaya). The organisation of the workshops was supported by colleagues from the International Department of the JINR and sponsored by the Heisenberg - Landau program of the German Ministry for Science and Technology (BMBF), the Russian Foundation for Basis Research and the UNESCO-ROSTE.

The general aim of the workshops was and is

  • to discuss recent developments in this field with particular emphasis on the work done in the different groups invited;
  • to establish and/or tighten direct co-operation links;
  • to bring together a number of leading scientists in the field of the theoretical description and experimental investigations of first-order phase transformations of the member countries of JINR, Germany and beyond in order to perform or develop new research projects in this field;
  • to analyse the limits and possible extensions of the theoretical description of multifragmentation based on nucleation-growth models;
  • to check whether the experimental facilities available at the JINR in Dubna can be utilised for an experimental investigation of the kinetics of phase transformation processes in different systems of interest.
These aims could be fully realised as it is evident also from the Workshop Proceedings (see Appendix 1) which have been published for the first time in 1999. Another volume of the proceedings will be published in 2002 to cover the three-year's activity from 2000 - 2002.



Topics of Discussion
While the general direction remains the same as in previous years, the accents for the 2002 - workshop are, again, somewhat changed.

The first aim of the 6th meeting consists in the continuation of the mutual detailed information and discussion of the work done in the different research groups. As it has been the case already in previous years, it is expected that such discussion will be of great use for all of the participants and initiate further common research projects.

As a second direction, the meeting is aimed for a continuation of a number of common research projects under way. One of the main topics will be the analysis of the problem how the recently developed model of nucleation and growth in freely expanding matter may be applied as an adequate tool for the understanding of multifragmentation in heavy-ion collisions. Another main topic will consists in the analysis of the possibilities of extension of a newly developed approach to nucleation theory to processes of crystallisation in liquids.

As the third aim, a detailed discussion of bubble formation as a special kind of phase formation processes will be continued. This process is till now relatively scarcely studied, however, of great potential interest in a variety of applications. With respect to nuclear theory, particular attention will be directed to a theoretical description of bubble formation and growth in expanding nuclear systems.

As a fourth direction, a comprehensive discussion of peculiarities of phase formation under time-varying external conditions is planned to be continued.

As a fifth general topic of discussion, an analysis of different new approaches to the description of nucleation processes is anticipated. Hereby the spectrum of possible applications will range from segregation in solid and liquid solutions, bubble formation in liquids and condensation in gases to crystallisation of melts. In the analysis of crystallisation processes in melts, particular emphasis will be devoted to the effect of stress development and stress relaxation on nucleation and cluster growth. As another particular interesting example of aggregation phenomena, processes of aggregation of fullerenes in different solutions will be analysed.

As in previous years, the possible connections between cluster formation and growth and general aspects of theory of structure formation processes in non- equilibrium systems including different aspects of self-organised criticality will be a topic of the discussion as well.



Some Hints
The program is divided as earlier into lectures and discussion meetings. In the lectures, commonly one main topic is addressed. The discussion meetings are devoted to the continuation of the discussion of the problems, not finished, the presentation of short contributions (less than 20 minutes) of the participants on similar research, the general acquaintance with the directions of research in the different institutes. The remaining time not covered by the program is reserved for mutual discussions and direct co-operation.

The time for the speakers in their lectures is - if not specified otherwise - not limited to allow a detailed explanation even of details of the research and an extensive discussion. Nevertheless, to have some order in anticipating the program, commonly 1 1/2 hours are taken as a rough estimate for the duration of one lecture. Thus, changes in the schedule are possible at any time. The detailed schedule of the workshop will be announced here as soon as it will be ready (Appendix 2).

The workshop languages are English and Russian. If possible, English should be preferred. Summaries of the content in the respective alternative language will be given simultaneously.



Time-table
  • The research and scientific communication meeting will be held in Dubna, April 2002, for a period of one month; hereby the mutual detailed information on the research carried out in the different groups (workshop part) will be covered primarily in the time from April 14 (arrival), till April, 21 (departure) 2002. If required (due to the number of contributions proposed), the workshop may start already on Sunday, April 14 with a full program. Latter point will be decided finally later.
  • Work on common projects under way (04. 04. - 28. 04. 2002) by special arrangement.
  • Mutual research visits of the participants in the course of the year (in dependence on financial funds available).




Financial Regulations
No conference fee is required. We will cover the costs for the stay in Dubna and the travel expenses (railway tickets) for invited speakers from Russia and the former Soviet republics to Dubna and back. In dependence on the funds available, we can try to support - in very limited cases - also the stay of colleagues beyond the circle mentioned above.



Addresses for Contacts
All questions concerning the workshop, please, submit to

Dr. Juern W. P. Schmelzer, Prof. Vyatcheslav B. Priezzhev
Joint Institute for Nuclear Research
Bogoliubov Laboratory of Theoretical Physics
Dubna 141980 Russia
Phone: (+49 381) 498 1614; (+7 09621) 63 703 (Schmelzer), (+7 09621) 65 333 (Priezzhev);
Fax: (+49 381) 498 2857; (+7 09621) 65 084 or 40 594
Email: juern-w.schmelzer@physik.uni-rostock.de, juern@thsun1.jinr.ru (Schmelzer); priezzvb@thsun1.jinr.ru (Priezzhev);
preferably via Email:
juern-w.schmelzer@physik.uni-rostock.de (till end of March, 2002)
juern@thsun1.jinr.ru (from beginning of April, 2002)
For further details see also the homepage of the Bogoliubov Laboratory of Theoretical Physics of the Joint Institute for Nuclear Research, Dubna, Russia.



Appendix

Nucleation Theory and Applications

J. W. P. Schmelzer, G. Roepke, V. B. Priezzhev Joint Institute for Nuclear Research Publishing House, Dubna, 1999
Contents
  1. Introduction 1
  2. V. V. Slezov, J. Schmelzer: Kinetics of Nucleation-Growth Processes: The Initial Stages 6
  3. J. W. P. Schmelzer, G. Roepke, J. Schmelzer, jn., V. V. Slezov: Shapes of Cluster Size Distributions Evolving in Nucleation-Growth Processes 82
  4. W. Kleinig, J. W. P. Schmelzer, G. Roepke: Fragmentation in Dissipative Collisions: A Computer Model Study 130
  5. F. M. Kuni, A. P. Grinin, V. B. Kurasov: Kinetics of Condensation at Gradual Creation of the Metastable State 160
  6. N. M. Kortsenstein, E. W. Samuilow: The Effect of Temperature Pulsations on the Rate of Homogeneous Nucleation in Vapor Condensation 194
  7. F. M. Kuni, A. K. Shchekin, A. P. Grinin: Kinetics of Condensation on Macroscopic Solid Nuclei at Low Dynamic Vapor Supersaturation 208
  8. J. W. P. Schmelzer, J. Schmelzer jn., I. S. Gutzow: Reconciling Gibbs and van der Waals: A New Approach to Nucleation Theory 237
  9. J. W. P. Schmelzer: Comments on Curvature Dependent Surface Tension and Nucleation Theory 268
  10. V. B. Priezzhev: The Upper Critical Dimension of the Abelian Sandpile Model 290
  11. A. M. Gusak, A. O. Bogatyrev: Thermodynamic and Kinetic Constraints on the Nucleation of Intermediate Phases During Reactive Diffusion 310
  12. A. K. Shchekin, D. V. Tatianenko, F. M. Kuni: Towards Thermodynamics of Uniform Film Formation on Solid Insoluble Particles 320
  13. S. I. Bastrukov, D. V. Podgainy, I. V. Molodtsova, V. S. Salamatin, O. I. Streltsova: Elastodynamics of Nuclear Fission in the Elastic Globe Model 341
  14. B. M. Smirnov: Excitations and Melting of a System of Bound Atoms 355
  15. I. Gutzow, D. Ilieva, V. Yamakov, Ph. Babalievski, L. D. Pye: Glass Transition: An Analysis in Terms of a Differential Geometry Approach 368
  16. G. A. Sycheva: Nucleation of Sodium Zinc Phosphate: Whether it is Homogeneous or Not? 419
  17. J. W. P. Schmelzer, T. N. Vasilevskaya, N. S. Andreev: On the Initial Stages of Spinodal Decomposition 425
  18. B. J. Mokross: Nucleation in Non-Homogeneous Enthalpy Systems 445
  19. J. Moeller, J. W. P. Schmelzer, I. Gutzow: Shapes of Critical Clusters under Stress 464
  20. Appendices 492
Copies of the proceedings can be ordered via:




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