Microscopic Phase-Space Exploration Modeling of Fm 258 Spontaneous Fission

Yusuke Tanimura, Denis Lacroix, Sakir Ayik

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)


We show that the total kinetic energy (TKE) of nuclei after the spontaneous fission of Fm258 can be well reproduced using simple assumptions on the quantum collective phase space explored by the nucleus after passing the fission barrier. Assuming energy conservation and phase-space exploration according to the stochastic mean-field approach, a set of initial densities is generated. Each density is then evolved in time using the nuclear time-dependent density-functional theory with pairing. This approach goes beyond the mean-field theory by allowing spontaneous symmetry breaking as well as a wider dynamical phase-space exploration leading to larger fluctuations in collective space. The total kinetic energy and mass distributions are calculated. New information on the fission process: fluctuations in scission time, strong correlation between TKE and collective deformation, as well as prescission particle emission, are obtained. We conclude that fluctuations of the TKE and mass are triggered by quantum fluctuations.

Original languageEnglish
Article number152501
JournalPhysical review letters
Issue number15
Publication statusPublished - 2017 Apr 12
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Microscopic Phase-Space Exploration Modeling of Fm 258 Spontaneous Fission'. Together they form a unique fingerprint.

Cite this