Correlated transitions in TKE and mass distributions of fission fragments described by 4-D Langevin equation.

ABSTRACT: We have decomposed to symmetric and asymmetric modes the mass-TKE fission fragment distributions calculated by 4-dimensional Langevin approach and observed how the dominant fission mode and symmetric mode change as functions of [Formula: see text] of the fissioning system in the actinides and trans-actinide region. As a result, we found that the symmetric mode makes a sudden transition from super-long to super short fission mode around ²⁵⁴Es. The dominant fission modes on the other hand, are persistently asymmetric except for ²⁵⁸Fm, ²⁵⁹Fm and ²⁶⁰Md when the dominant fission mode suddenly becomes symmetric although it returns to the asymmetric mode around ²⁵⁶No. These correlated "twin transitions" have been known empirically by Darleane

SUBMITTER: Usang MD 

PROVIDER: S-EPMC6365521 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature