Abstract
An analysis of basicmechanisms of binary and ternary fission of nuclei led to the conclusion that true ternary and quaternary fission of nuclei has a sequential two-step (three-step) character, where, at the first step, a fissile nucleus emits a third light particle (third and fourth light particles) under shakeup effects associated with a nonadiabatic character of its collective deformation motion, whereupon the residual nucleus undergoes fission to two fission fragments. Owing to this, the formulas derived earlier for the widths with respect to sequential two- and three-step decays of nuclei in constructing the theory of two-step twoproton decays and multistep decays in chains of genetically related nuclei could be used to describe the relative yields and angular and energy distributions of third and fourth light particles emitted in (α, α), (t, t), and (α, t) pairs upon the true quaternary spontaneous fission of 252Cf and thermal-neutron-induced fission of 235U and 233U target nuclei. Mechanisms that explain a sharp decrease in the yield of particles appearing second in time and entering into the composition of light-particle pairs that originate from true quaternary fission of nuclei in relation to the yields of analogous particles in true ternary fission of nuclei are proposed.
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References
V. N. Andreev et al., Sov. J. Nucl. Phys. 8, 22 (1969).
S. S. Kapoor et al., in Proceedings of the Symposium on Nuclear Physics and Soild State Physics, Chandigarh, India, 1972, Vol. 15b, p. 107.
S. S. Kataria et al., in Proceedings of the Symposium on Physics and Chemistry of Fission, Rochester, New York, USA, 1973 (IAEA, Vienna, 1974), Vol. 2, p. 389.
A. S. Fomichev et al., Nucl. Instum. Methods Phys. Res. A 384, 519 (1997).
P. Jesinger et al., in Proceedings of the Symposium on Nuclear Clusters, Rauischholzhausen, Germany, 2002 (EP Systema, Debrecen, 2003), p. 289.
P. Jesinger et al., Eur. Phys. J. A 24, 379 (2005).
M. Mutterer et al., in Proceedings of the 5th International Conference on Dynamical Aspects of Nuclear Fission, Casta-Papiernicka, Slovak Republic, 2001 (World Sci., Singapore, 2002), p. 191.
S. G. Kadmensky and L. V. Titova, Phys. At. Nucl. 76, 16 (2013).
S. G. Kadmensky, Phys. At. Nucl. 65, 1390 (2002); Phys. At. Nucl. 65, 1785 (2002).
S. G. Kadmensky, Phys. At. Nucl. 66, 1691 (2003).
V. E. Bunakov and S. G. Kadmensky, Phys. At. Nucl. 66, 1846 (2003).
S. G. Kadmensky, Phys. At. Nucl. 67, 170 (2004); Phys. At. Nucl. 67, 241 (2004).
N. Carjan, J. Phys. (Paris) 37, 1279 (1976).
N. Carjan and B. Leroux, Phys. Rev. C 22, 2008 (1980).
O. Tanimura, and T. Fliessbach, Z. Phys. A 328, 475 (1987).
S. G. Kadmensky and Yu. V. Ivankov, Phys. At. Nucl. 77, 1019 (2014).
S. G. Kadmensky and Yu. V. Ivankov, Phys. At. Nucl. 77, 1532 (2014).
S. G. Kadmensky and A. O. Bulychev, in Proceedings of the 64th International Conference Nucleus-2014, Minsk, Belarus, 2014, p. 181.
L. V. Grigorenko, Phys. Part. Nucl. 40, 674 (2009).
Experimental Nuclear Physics, Ed. by E. Segre (Wiley, New York, London, 1953), Vol. 2.
A. Bohr and B. R. Mottelson, Nuclear Structure (Benjamin, New York, 1969, 1975; Mir, Moscow, 1971, 1977), Vols. 1, 2.
J. R. Nix, Nucl. Phys. A 130, 241 (1969).
M. Brack et al., Rev.Mod. Phys. 44, 320 (1972).
S. G. Kadmensky, V. E. Bunakov, and L. V. Titova, Phys. At. Nucl. 78, 662 (2015).
V. A. Rubchenya and S. G. Yavshits,Sov. J. Nucl. Phys. 40, 416 (1984).
S. G. Kadmensky et al., Sov. J. Nucl. Phys. 39, 4 (1984).
I. Halperm, in Proceedings of the Symposium on Physics and Chemistry of Fission (IAEA, Vienna, 1964), p. 369.
M. Mutterer and J. P. Theobald, Nuclear Decay Modes (IOP Publ., Bristol, 1996), Ch. 12.
M. Ya. Barkovskii et al., Preprint No. 1540, LIYad. Fiz. (Leningr. Inst. Yad. Fiz. AN SSSR, Leningrad, 1989).
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Original Russian Text © S.G. Kadmensky, L.V. Titova, A.O. Bulychev, 2015, published in Yadernaya Fizika, 2015, Vol. 78, No.s. 7–8, pp. 716–724.
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Kadmensky, S.G., Titova, L.V. & Bulychev, A.O. Properties of true quaternary fission of nuclei with allowance for its multistep and sequential character. Phys. Atom. Nuclei 78, 672–679 (2015). https://doi.org/10.1134/S1063778815050117
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DOI: https://doi.org/10.1134/S1063778815050117