Determination of the mean fission lifetime by using the one-dimensional Langevin equation
by A. Zerarka, K. Mahboub, V.G. Foester
International Journal of Nuclear Energy Science and Technology (IJNEST), Vol. 2, No. 4, 2006

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 E_lab = 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.

Online publication date: Tue, 19-Dec-2006

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