Microscopic Description of Complex Nuclear Decay: Multimodal Fission

Staszczak, A.; Baran, A.; Dobaczewski, J.; Nazarewicz, Witold

doi:10.1103/PhysRevC.80.014309

Title: Microscopic Description of Complex Nuclear Decay: Multimodal Fission

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.80.014309· OSTI ID:1007814

Staszczak, A. ^[1]; Baran, A. ^[1]; Dobaczewski, J. ^[2]; Nazarewicz, Witold ^[3]

Maria Curie-Sklodowska University
Warsaw University
ORNL

This year marks the 70th anniversary of the discovery of nuclear fission. While there is little question of the societal importance of fission (e.g., to current and future energy needs), our understanding of this process is still fairly rudimentary due to the intricacy of the problem. Theoretically, fission represents an extreme example of the large-amplitude collective motion: the tunneling of a large, self-bound, superfluid system of mutually interacting particles. In this work, we describe a study of spontaneous fission using the self-consistent nuclear density functional theory and state-of-the-art computational tools. We did not impose any symmetry on the mean field so that the nuclear densities were allowed to acquire arbitrary shapes characterized by elongation, reflection-asymmetry, triaxiality, necking, etc. Here we show that the observed half-lives of nuclei undergoing bimodal fission can be explained in terms of competing pathways corresponding to different geometries of fission products. This is an important step in providing a many-body description of fundamental nuclear decay.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: DE-AC05-00OR22725

OSTI ID:: 1007814

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 80, Issue 1; ISSN 0556-2813

Country of Publication:: United States

Language:: English

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