scholarly journals Microscopic description of induced fission dynamics with nuclear energy density functionals

2020 ◽  
Vol 27 ◽  
pp. 168
Author(s):  
Vaia Prassa ◽  
H Tao ◽  
J. Zhao ◽  
Z. P. Li ◽  
T. Nikšić ◽  
...  
Keyword(s):  
Energy Density ◽  
Nuclear Energy ◽  
Energy Surface ◽  
Mean Field ◽  
Density Functionals ◽  
Fission Process ◽  
Generator Coordinate Method ◽  
Generator Coordinate ◽  
Pairing Correlations ◽  
Induced Fission

Static and dynamic aspects of the fission process are analyzed in a self-consistent framework based on energy density functionals. Multidimensionally constrained mean-field calculations in the collective space determine the potential energy surface of the fissioning nucleus, the scission line, the single-nucleon wave functions, energies, and occupation probabilities. Induced fission dynamics is described using the time-dependent generator coordinate method in the Gaussian overlap approximation. The position of the scission line is analyzed as a function of the strength of the pairing interaction, as well as the effect of static pairing correlations on charge yields and total kinetic energy of fission fragments.

RELATIVISTIC NUCLEAR ENERGY DENSITY FUNCTIONALS

2010 ◽  
Vol 19 (04) ◽  
pp. 548-557 ◽  
Author(s):  
D. VRETENAR ◽  
T. NIKŠIĆ ◽  
P. RING
Keyword(s):  
Energy Density ◽  
Degrees Of Freedom ◽  
Nuclear Energy ◽  
Effective Interaction ◽  
Binding Energies ◽  
Large Set ◽  
Density Functionals ◽  
Heavy Nuclei ◽  
Interaction Terms ◽  
Range Dynamics

A class of relativistic nuclear energy density functionals is explored, in which only nucleon degrees of freedom are explicitly used in the construction of effective interaction terms. Short-distance correlations, as well as intermediate and long-range dynamics, are encoded in the nucleon-density dependence of the strength functionals of an effective interaction Lagrangian. The resulting phenomenological effective interaction, adjusted to experimental binding energies of a large set of axially deformed nuclei, together with a new separable pairing interaction adjusted to reproduce the pairing gap in nuclear matter calculated with the Gogny force, is applied in triaxial relativistic Hartree-Bogoliubov calculations of sequences of heavy nuclei: Th , U , Pu , Cm , Cf , Fm , and No .

COLLECTIVE-DYNAMICS EFFECTS IN FISSION OF 256,258FM ISOTOPES

2008 ◽  
Vol 17 (01) ◽  
pp. 81-88 ◽  
Author(s):  
A. DOBROWOLSKI ◽  
H. GOUTTE ◽  
J.-F. BERGER
Keyword(s):  
Generating Functions ◽  
Time Dependent ◽  
Two Dimensional ◽  
Generator Coordinate Method ◽  
Coordinate Method ◽  
Collective Dynamics ◽  
Hartree Fock ◽  
Mass Distributions ◽  
Generator Coordinate ◽  
Induced Fission

A dynamical approach to the neutron-induced fission of 255,257 Fm isotopes based on the time-dependent generator-coordinate method is applied. As the generating functions the eigensolutions of the constrained Hartree-Fock-Bogoliubov method with the effective D1S Gogny force are used. The here presented collective-dynamics calculations in the two-dimensional collective space described by quadrupole and octupole moments allow to determine the fragment mass distributions of those two Fm isotopes.

scholarly journals Surface symmetry energy of nuclear energy density functionals

2011 ◽  
Vol 83 (3) ◽  
Author(s):  
N. Nikolov ◽  
N. Schunck ◽  
W. Nazarewicz ◽  
M. Bender ◽  
J. Pei
Keyword(s):  
Energy Density ◽  
Symmetry Energy ◽  
Nuclear Energy ◽  
Density Functionals

PAIRING CORRELATIONS IN THE STRONG FLUCTUATIONS REGIME

2004 ◽  
Vol 13 (01) ◽  
pp. 235-238
Author(s):  
M. A. FERNÁNDEZ ◽  
J. L. EGIDO
Keyword(s):  
Exact Solution ◽  
Weak Crossover ◽  
Generator Coordinate Method ◽  
Coordinate Method ◽  
Generator Coordinate ◽  
Pairing Correlations

A general BCS Ansatz based on the Generator Coordinate Method is proposed to study pairing properties in superconducting grains. The formalism is applied to the pairing Hamiltonian where we reproduce the exact solution in the weak, crossover and strong pairing regimes.

Pairing correlations in the rotating nucleus discussed within the generator coordinate method

1990 ◽  
Vol 41 (1) ◽  
pp. 298-308 ◽  
Author(s):  
W. Satuła ◽  
W. Nazarewicz ◽  
Z. Szymański ◽  
R. Piepenbring
Keyword(s):  
Generator Coordinate Method ◽  
Coordinate Method ◽  
Generator Coordinate ◽  
Pairing Correlations

scholarly journals Constraints on the inner edge of neutron star crusts from relativistic nuclear energy density functionals

2010 ◽  
Vol 81 (6) ◽  
Author(s):  
Ch. C. Moustakidis ◽  
T. Nikšić ◽  
G. A. Lalazissis ◽  
D. Vretenar ◽  
P. Ring
Keyword(s):  
Neutron Star ◽  
Energy Density ◽  
Nuclear Energy ◽  
Density Functionals
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