Title: Determination of the mean fission lifetime by using the one-dimensional Langevin equation
Authors: A. Zerarka, K. Mahboub, V.G. Foester
Addresses: Departement de Physique theorique, Universite Med Khider, BP 145, Biskra 07000, Algeria. ' Departement de Physique theorique, Universite Med Khider, BP 145, Biskra 07000, Algeria. ' Departement de Physique theorique, Universite Med Khider, BP 145, Biskra 07000, Algeria
Abstract: This study focuses on the evaluation of the mean fission lifetime. We have used the dynamic equations of motion that contain the active forces (Coulomb + surface + rotational energies) and the nuclear viscosity. We suggest a new formalism to evaluate the mean deformation moment at the scission point. We have calculated the mean fission lifetime for the 220Th nucleus formed in the reaction 40Ar + 180Hf at Elab = 180, 190, 216 and 249 MeV. The one-body dissipation coefficient and the reduced friction β = 40 × 1021 s-1 are used to reproduce a variety of experimental results. The values obtained range from 5.82 × 10-20 s to 14 × 10-20 s.
Keywords: Langevin equation; one-body dissipation; mean fission lifetime; nuclear viscosity; equations of motion; nuclear fission; nuclear energy; nuclear power; nuclear science; nuclear technology.
DOI: 10.1504/IJNEST.2006.011717
International Journal of Nuclear Energy Science and Technology, 2006 Vol.2 No.4, pp.342 - 351
Published online: 19 Dec 2006 *
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