Investigación

 

Coulomb effects in isobaric cold fission from reactions ²³³U(n_th,f), ²³⁵U(n_th,f), ²³⁹Pu(n_th,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(n_th,f), ²³⁵U(n_th,f) and ²³⁹Pu(n_th,f), is confirmed in high kinetic energy as well as in low excitation energy windows, respectively. Data from reactions ²³³U(n_th,f), ²³⁵U(n_th,f), ²³⁹Pu(n_th,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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