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International Journal of Modern Physics E 21 (2012) 1250051
Further Microscopic Studies of the Fission Barriers of Heavy Nuclei
T.V. Nhan Hao1, J. Le Bloas1, Meng-Hock Koh1, L. Bonneau1, Ph. Quentin1

Two systematic sources of error in most current microscopic evaluations of fission-barrier heights are studied. They are concerned with an approximate treatment of the Coulomb exchange terms (known as the Slater approximation) in the self-consistent mean-fields and the projection on good parity states (e.g., of positive parity for the spontaneous fission of an even-even nucleus) of left-right reflection asymmetric intrinsic solutions (e.g., around the second barrier). Approximate or unprojected solutions are shown to lead each to an underestimation of the barrier heights by a few hundred keV.
1 :  CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
Physique/Physique Nucléaire Théorique
Microscopic calculations – fission barriers – Coulomb energy – parity projection – Hartree-Fock and random-phase approximations – Spontaneous fission – Fission reactions