Coulomb effects in isobaric cold fission from reactions 233U(nth,f), 235U(nth,f), 239Pu(nth,f) and 252Cf(sf)
M. Montoya
Instituto Peruano de Energía Nuclear, Canadá 1470, San Borja, Lima, Perú, Facultad de Ciencias, Universidad Nacional de Ingeniería, Av Túpac Amaru 210, Rímac, Lima, Perú, e-mail: mmontoya@ipen.gob.pe
Received 20 March 2014; ]]> Accepted 31 July 2014
Abstract
The Coulomb effect hypothesis, formerly used to interpret fluctuations in the curve of maximal total kinetic energy as a function of light fragment mass in reactions 233U(nth,f), 235U(nth,f) and 239Pu(nth,f), is confirmed in high kinetic energy as well as in low excitation energy windows, respectively. Data from reactions 233U(nth,f), 235U(nth,f), 239Pu(nth,f) and 252Cf(sf) show that, between two isobaric fragmentations with similar Q-values, the more asymmetric charge split reaches the higher value of total kinetic energy. Moreover, in low excitation energy windows, between two isobaric charge splits with different Q-values, the more asymmetrical fragmentations is preferred.
Keywords: Fission fragments; kinetic energy; charge; mass; cold fission.
PACS: 24.75.+i; 25.85.-w; 21.10.sf; 21.10.Gv
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1. H. W. Schmitt, J.H. Neiler and F. J. Walter, Phys. Rev. 141 (1966)1146 [ Links ]
2. F. Pleasonton, Phys. Rev. 174 (1968) 1500. [ Links ]
3. C. Signarbieux et al., J. Physique Lettres 42 (1981) 437. [ Links ]
4. M. Montoya, Thesis (Université Paris XI, Orsay, 1981).
5. P. Armbruster et al., The cold fragmentation of 234U in 233U(nth ,f) 4th International Conference on Nuclei far from Stability, (Helsingr, proceedings CERN 81-09, Geneva 1981). [ Links ]
6. M. Montoya, Z. Phys. A. 319 (1984) 219. [ Links ]
7. M. Montoya, R.W. Hasse and P. Koczon, Z. Phys. A. 325 (1986) 357. [ Links ]
8. H.-G. Clerc et al, Nucl. Phys. A 452 (1986) 277. [ Links ]
9. G. Audi, A.H. Wapstra and C. Thibault (2003). http://www.nndc.bnl.gov/masses/mass.mas03,
10. U. Quade et al., Nucl. Phys. A 487 (1988) 1. [ Links ]
11. F. Gönnenwein and B. Börsig, Nucl. Phys. A 530 (1991) 27. [ Links ]
]]>12. W. Schwab, H.-G. Clerc, M. Mutterer, J.P. Theobald and H. Faust, Nucl. Phys. A 577 (1994) 674. [ Links ]
13. W. Lang, H.-G. Clerc, H. Wohlfarth, H. Schrader and K.-H. Schmidt, Nucl. Phys. A 345 (1980) 34. [ Links ]
14. G. Simon, J. Trochon and C. Signarbieux, Fission meeting, Arcachon (France), 14-17 Oct 1986, CEA-CONF-8860. [ Links ]
15. C. Signarbieux, 1st Intern. Conf. on Dynamical Aspects of Nuclear Fission, (Smolenice, Slovakia, J. Kristiak and B.I.Pustylnik, eds., J.I.N.R., Dubna, 1992) p. 19. [ Links ]
16. F.-J. Hambsch, H.-H. Knitter and C. Budtz-Jorgensen, Nucl. Phys. A 554 (1993)209. [ Links ]
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