Critical insight into the influence of the potential energy surface on fission dynamics

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.014610· OSTI ID:21596590

Mazurek, K ^[1]; Schmitt, C; Wieleczko, J P; Ademard, G ^[2]; Nadtochy, P N ^[3]

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1. Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow (Poland)
2. Grand Accelerateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, F-14076 Caen (France)
3. Omsk State University, Department of Theoretical Physics, 644077 Omsk (Russian Federation)

The present work is dedicated to a careful investigation of the influence of the potential energy surface on the fission process. The time evolution of nuclei at high excitation energy and angular momentum is studied by means of three-dimensional Langevin calculations performed for two different parametrizations of the macroscopic potential: the Finite Range Liquid Drop Model (FRLDM) and the Lublin-Strasbourg Drop (LSD) prescription. Depending on the mass of the system, the topology of the potential throughout the deformation space of interest in fission is observed to noticeably differ within these two approaches, due to the treatment of curvature effects. When utilized in the dynamical calculation as the driving potential, the FRLDM and LSD models yield similar results in the heavy-mass region, whereas the predictions can be strongly dependent on the Potential Energy Surface (PES) for medium-mass nuclei. In particular, the mass, charge, and total kinetic energy distributions of the fission fragments are found to be narrower with the LSD prescription. The influence of critical model parameters on our findings is carefully investigated. The present study sheds light on the experimental conditions and signatures well suited for constraining the parametrization of the macroscopic potential. Its implication regarding the interpretation of available experimental data is briefly discussed.

• OSTI ID: 21596590
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevC.84.014610; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
DEFORMATION
DISTRIBUTION
EVOLUTION
EXCITATION
FISSION
FISSION FRAGMENTS
FORECASTING
INTERMEDIATE MASS NUCLEI
KINETIC ENERGY
LIQUID DROP MODEL
MASS
POTENTIAL ENERGY
SURFACES
THREE-DIMENSIONAL CALCULATIONS
TOPOLOGY
ENERGY
ENERGY-LEVEL TRANSITIONS
MATHEMATICAL MODELS
MATHEMATICS
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI