Summary
Within the three-centre model we have studied the dynamics of ternary fission for superheavy systems by solving the classical equations of motion with the potential energy surface given by the liquid-drop model (LDM) and the mass parameters and the viscosity tensor given by Werner-Wheeler method. The parametrization of nuclear shapes permits us to describe the sequence of configurations from the compound nucleus to three separated fragments. We have studied the effect of the initial conditions on the dynamical path of ternary fission and compared the trajectories of binary and ternary fission for the same initial condition. We have also studied the dependence of the mass of a third part between the two end fragments and the translational kinetic energy at the scission point onZ 2/A 1/3 of nuclei.
Riassunto
Nell'ambito del modello a 3 centri si è studiata la dinamica della fissione ternaria per sistemi superpesanti risolvendo le equazioni classiche di moto con l'energia potenziale di superficie data dal modello a goccia liquida (LDM) e i parametri di massa e il tensore di viscosità dato dal modello di Werner-Wheeler. La parametrizzazione delle forme nucleari permette di descrivere la sequenza di configurazioni dal nucleo composto a tre frammenti separati. Si è studiato l'effetto delle condizioni iniziali sul percorso dinamico della fissione ternaria e sono state confrontate le traiettorie della fissione binaria e ternaria per la stessa condizione iniziale. Si è anche studiata la dipendenza della massa di una terza parte tra i due seguenti terminali dell'energia cinetica traslazionale al punto di scissione suZ 2/A 1/3 del nucleo.
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References
J. Reinhardt andW. Greiner:Heavy Ion Atomic Physics, inHeavy Ion Science, Vol.3, edited byD. A. Bromley (New York, N. Y., 1982).
I. Halpern:Alpha particle emission in fission, inPhysics and Chemistry of Fission, Vol.2 (Vienna, 1965), p. 369.
J. Hahn, H. J. Lustig andW. Greiner:Z. Naturforsch., Teil A,32, 215 (1977).
A. R. Degheidy andJ. A. Maruhn:Z. Phys. A,290, 205 (1979).
P. Fong:Phys. Rev. C,3, 2025 (1971).
Y. Boneh, Z. Fraenkel andI. Nebenzahl:Phys. Rev.,156, 1305 (1967).
G. M. Raisbeck andT. D. Thomas:Phys. Rev.,172, 1272 (1968).
W. D. Diehl andW. Greiner:Nucl. Phys. A,229, 29 (1974).
Xi-Zhen Wu, J. A. Maruhn andW. Greiner:J. Phys. G,10, 645 (1984).
A. Maruhn andW. Greiner:Z. Phys.,251, 431 (1972).
J. A. Maruhn, W. Greiner andW. Scheid:Theory of fragmentation in fission, fusion and heavy ion scattering, inHeavy Ion Collisions, Vol.2, edited byR. Bock (North-Holland Publ. Co., Amsterdam, 1980).
K. T. R. Davies, A. I. Sierk andJ. R. Nix:Phys. Rev., C 13, 2385 (1976).
J. Schirmer, S. Knaak andG. Süssmann:Nucl. Phys. A,199, 31 (1973).
R. Wieczorek, R. W. Hasse andG. Süssmann: inProceedings of the III International Atomic Energy Agency Symposium on the Physics and Chemistry of Fission, Vol.1 (Rochester, New York, N. Y., 1973), p. 523.
G. Wegmann:Phys. Lett. B,50, 327 (1974).
D. H. E. Gross:Nucl. Phys. A,240, 472 (1975).
W. J. Swiatecki: Lawrence Berkeley Laboratory Report No. LBL-4296 (1975).
H. C. Pauli:Phys. Scr., A 10, 127 (1974).
D. R. Inglis:Phys. Rev.,103, 1786 (1956).
H. Goldstein:Classical Mechanics (Addison-Wesley, Reading, Mass., 1959), Chapt. 1, Sect. 5, p. 19.
D. Scharnweber, W. Greiner andU. Mosel:Nucl. Phys. A,164, 257 (1971).
W. D. Myers andW. J. Swiatecki:Nucl. Phys.,81, 1 (1966).
Xi-Zhen Wu, J. A. Maruhn andW. Greiner: to be published.
J. R. Nix:Nucl. Phys. A,130, 241 (1969).
A. Ralston andH. S. Wilf:Mathematical Methods for Digital Computers (Wiley, New York, N. Y., London, 1960), p. 95.
Xi-Zhen Wu, J. A. Maruhn andW. Greiner:J. Phys. G,10, L93 (1984).
K. Depta et al.: GSI-Annual Report (1983).
J. R. Nix andA. J. Sierk: preprint LA-UR-84-1566.
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This work has been supported by the Bundesministerium für Forschung und Technologie (BMFT) and by the Gesellschaft für Schwerionenforschung (GSI).
Traduzione a cura della Redazione.
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Wu, Xz., Depta, K., Herrmann, R. et al. Study of dynamics in ternary fission by solving classical equations of motion. Nuov Cim A 87, 309–323 (1985). https://doi.org/10.1007/BF02902224
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DOI: https://doi.org/10.1007/BF02902224