Microscopic self-consistent description of induced fission: dynamical pairing degree of freedom

Abstract

The role of dynamical pairing in induced fission dynamics is investigated using the time-dependent generator coordinate method in the Gaussian overlap approximation, based on the microscopic framework of nuclear energy density functionals. A calculation of fragment charge yields for induced fission of ${}^{228}$Th is performed in a three-dimensional space of collective coordinates that, in addition to the axial quadrupole and octupole intrinsic deformations of the nuclear density, also includes an isoscalar pairing degree of freedom. It is shown that the inclusion of dynamical pairing has a pronounced effect on the collective inertia, the collective flux through the scission hyper-surface, and the resulting fission yields, reducing the asymmetric peaks and enhancing the contribution of symmetric fission, in better agreement with the empirical trend.

8 pages, 6 figures. arXiv admin note: text overlap with arXiv:2004.10089

References in corpus (8)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies
• Pairing-induced speedup of nuclear spontaneous fission
• Microscopic study of induced fission dynamics of ${}^{226}$Th with covariant energy density functionals
• The time-dependent generator coordinate method in nuclear physics
• Time-dependent generator coordinate method study of mass-asymmetric fission of actinides
• Role of dynamic pairing correlations in fission dynamics
• Time-dependent generator coordinate method study of fission: mass parameters