Abstract
A three-center phenomenological model, able to explain qualitatively the recently obtained experimental results concerning the quasimolecu-lar stage of a light-particle accompanied fission process is presented. It was derived from the liquid drop model under the assumption that the aligned configuration, with the emitted particle between the light and heavy fragment, is reached by increasing continuously the separation distance, while the radii of the heavy fragment and of the light particle are kept constant. In such a way, a new minimum appears in the deformation energy at a separation distance very close to the touching point. This minimum allows the existence of a short-lived quasi-molecular state, decaying into the three final fragments. The influence of the shell effects is discussed. The half-lives of some quasimolecular states which could be formed in the 10Be and 12C accompanied fission of 252Cf are roughly estimated to be of the order of 1 ns and 1 ms, respectively.
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References
L.W. Alvarez, as reported by G. Farwell, E. Segrè and C. Wiegand, Phys. Rev. 71 (1947) 327; T. San-Tsiang et al., C. R. Acad. Sci. Paris 223 (1946) 986.
M. Mutterer and J.P. Theobald, Nuclear Decay Modes, ed. D.N. Poenaru, IOP Publishing, Bristol, 1996, p. 487.
N. Bohr and J. Wheeler, Phys. Rev. 55 (1939) 426.
V.M. Strutinsky, Nucl. Phys. A95 (1966) 420.
W.D. Myers and W.J. Swiatecki, Nucl. Phys. A81 (1966) 1.
D.N. Poenaru and W. Greiner, Nuclear Decay Modes, IOP Publishing, Bristol, 1996, p. 275.
A. Săndulescu, D.N. Poenaru and W. Greiner, Sov. J. Part. Nucl. 11 (1980) 528.
E. Hourany et al., Experimental Techniques in Nuclear Physics, eds D.N. Poenaru and W. Greiner, Walter de Gruyter, Berlin, 1997, p. 117.
R. Bonetti and A. Guglielmetti, Nuclear Decay Modes, IOP Pub., Bristol, 1996, p. 370.
E. Hourany, Nuclear Decay Modes, IOP Pub., Bristol, 1996, p. 350.
C. Signarbieux et al., J. Phys. Lett. (Paris) 42 (1981) L437.
E.K. Hulet et al., Phys. Rev. Lett. 56 (1986) 313.
D. N. Poenaru and W. Greiner, Handbook of Nuclear Properties, Oxford University Press, Oxford, 1996, p. 131.
A.V. Ramayya et al., Phys. Rev. C 57 (1998) 2370.
A.V. Ramayya et al., Phys. Rev. Lett. 81 (1998) 947.
J.H. Hamilton et al., Prog. Part. Nucl. Phys. 35 (1995) 635; G.M. Ter-Akopian et al., Phys. Rev. Lett. 77 (1996) 32.
P. Singer et al., Dynamical Aspects of Nuclear Fission, Proc. 3rd Int. Conf., Častá-Papiernička, Slovakia, 1996, JINR, Dubna, 1996, p. 262.
D.A. Bromley et al., Phys. Rev. Lett. 4(1960) 365.
W. Greiner, J.Y. Park, W. Scheid, Nuclear Molecules, World Sci., Singapore, 1995.
D.N. Poenaru, B. Dobrescu, W. Greiner, J.H. Hamilton, A.V. Ramayya, J. Phys. G. 26(2000) L97.
D.N. Poenaru et al., Fission and Properties of Neutron-Rich Nuclei, eds J.H. Hamilton et al., World Sci., Singapore, 2000, p. 332.
D.N. Poenaru, B. Dobrescu, W. Greiner, Clustering Aspects of Nuclear Structure and Dynamics, World Sci., Singapore, 2000, p. 205.
D.N. Poenaru, M. Ivaşcu, W. Greiner, Particle Emission from Nuclei, Vol. III: Fission and Beta-Delayed Decay Modes, CRC Press, Boca Raton, Florida, 1989, p. 203.
D.N. Poenaru et al., Phys. Rev. C 59 (1999) 3457.
D.N. Poenaru and M. Iva¢cu, Comp. Phys. Comm. 16 (1978) 85.
H. Schultheis and R. Schultheis, Phys. Lett. B37 (1971) 467.
D.L. Hill, Proc. 2nd UN Int. Conf. on the Peaceful Uses of Atomic Energy, United Nations, Geneva, 1958, p. 244.
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Poenaru, D.N., Dobrescu, B., Greiner, W. et al. Fission Energy Surfaces and Ternary Fission. APH N.S., Heavy Ion Physics 13, 79–88 (2001). https://doi.org/10.1556/APH.13.2001.1-3.9
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DOI: https://doi.org/10.1556/APH.13.2001.1-3.9