skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Pauli energy contribution to the nucleus-nucleus interaction

Journal Article · · Physical Review C

Background: The Pauli exclusion principle plays a crucial role as a building block of many-body quantal systems comprised of fermions. It also induces a “Pauli repulsion” in the interaction between di-nuclear systems. It has been shown in [Phys. Rev. C 95, 031601(R) (2017)] that the Pauli repulsion widens the nucleus-nucleus potential barrier, thus hindering sub-barrier fusion. Purpose: To investigate the proton and neutron contributions to the Pauli repulsion, both in the bare potential neglecting shape polarization and transfer between the reactants, as well as in the dynamical potential obtained by accounting for such dynamical rearrangements. Methods: As the basis of our study we utilize the Pauli kinetic energy (PKE) obtained by studying the nuclear localization function (NLF). Recently this approach has been generalized to incorporate all of the dynamical and time-odd terms present in the nuclear energy density functional. This approach is employed in the density constrained frozen Hartree-Fock (DCFHF) and in the density constrained time-dependent Hartree-Fock (DC- TDHF) microscopic methods. Results: The PKE spatial distribution shows that a repulsion occurs in the neck between the nuclei when they first touch. Inside the barrier, neutrons can contribute significantly more to the Pauli repulsion in neutron-rich systems. Dynamical effects tend to lower the Pauli repulsion near the barrier. Proton and neutron dynamical contributions to the PKE significantly differ inside the barrier for asymmetric collisions, which is interpreted as an effect of multinucleon transfer. Conclusions: The PKE is shown to make a significant contribution to nuclear interaction potentials. Protons and neutrons can play very different roles in both the bare potential and in the dynamical rearrangement. Further microscopic studies are required to better understand the role of transfer and to investigate the effect of pairing and deformation.

Research Organization:
Vanderbilt Univ., Nashville, TN (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP); Australian Research Council (ARC)
Grant/Contract Number:
SC0013847; NA0003841; DP190100256
OSTI ID:
1820663
Journal Information:
Physical Review C, Vol. 104, Issue 3; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (101)

Semiclassical theory of nuclear fission journal September 1981
Adiabatic fusion barriers from self-consistent calculations journal October 2007
Heavy-ion interaction potential deduced from density-constrained time-dependent Hartree-Fock calculation journal August 2006
Analytic Methods in Open String Field Theory journal December 2012
Dependence of fusion on isospin dynamics journal January 2017
Effect of the Pauli exclusion principle and the polarization of nuclei on the potential of their interaction for the example of the 16O+16O system journal May 2013
Microscopic sub-barrier fusion calculations for the neutron star crust journal May 2012
Barrier penetration and spontaneous fission in the time-dependent mean-field approximation journal November 1980
Recent developments in heavy-ion fusion reactions journal March 2014
Microscopic study of 16 O + 16 O fusion journal August 2013
Absence of hindrance in a microscopic C 12 + C 12 fusion study journal August 2019
Low-energy heavy-ion reactions and the Skyrme effective interaction journal January 2019
Kinetic energy contributions to heavy ion potentials journal May 1975
How the Pauli exclusion principle affects fusion of atomic nuclei journal March 2017
Zum Problem der Anaphylaxie mit chemisch bekannten Substanzen journal January 1939
Nuclear Hartree-Fock calculations with splines journal December 1991
Electron and Nucleon Localization Functions of Oganesson: Approaching the Thomas-Fermi Limit journal January 2018
Microscopic and proximity nucleus-nucleus potentials journal April 1978
Synthesis of superheavy nuclei: Nucleon collectivization as a mechanism for compound nucleus formation journal August 2001
Density-based energy decomposition analysis for intermolecular interactions with variationally determined intermediate state energies journal October 2009
Generation of high-frequency components in TDHF heavy-ion collisions journal September 1981
Heavy-ion collisions and fission dynamics with the time-dependent Hartree–Fock theory and its extensions journal November 2018
Comparison of the Microscopic Potential with the Optical Potential in the α + O 16 System journal May 1987
New Theoretical Approach to Nuclear Heavy-Ion Scattering journal September 1968
Becke-Johnson-type exchange potential for two-dimensional systems journal March 2010
Microscopic study of Ca + Ca fusion journal April 2012
The Connection Between Spin and Statistics journal October 1940
Local density approximation for proton-neutron pairing correlations: Formalism journal January 2004
Using Pauli energy to appraise the quality of approximate semilocal non-interacting kinetic energy density functionals journal May 2019
Energy dependence of the nucleus-nucleus potential close to the Coulomb barrier journal August 2008
Imaginary-time mean-field method for collective tunneling journal December 2020
Particle Transfer Reactions with the Time-Dependent Hartree-Fock Theory Using a Particle Number Projection Technique journal November 2010
Quantum Calculations of Coulomb Reorientation for Sub-Barrier Fusion journal September 2004
Time-dependent hartree-fock theory with Skyrme's interaction journal September 1975
CVII. The nuclear surface journal November 1956
Self-consistent mean-field models for nuclear structure journal January 2003
Time dependent Hartree-Fock fusion calculations for spherical, deformed systems journal August 2006
Nuclear quantum many-body dynamics: From collective vibrations to heavy-ion collisions journal November 2012
A periodic energy decomposition analysis method for the investigation of chemical bonding in extended systems journal May 2015
Localization in light nuclei journal March 2011
Cluster transfer in the reaction 16 O + 208 Pb at energies well below the fusion barrier: A possible doorway to energy dissipation journal November 2011
Timescales of Quantum Equilibration, Dissipation and Fluctuation in Nuclear Collisions journal May 2020
TDHF Theory and Its Extensions for the Multinucleon Transfer Reaction: A Mini Review journal March 2019
Cluster radioactivity of Og 176 118 294 journal April 2019
Entrance channel potentials in the synthesis of the heaviest nuclei journal November 2002
Effect of the Pauli exclusion principle on the potential of nucleus-nucleus interaction journal July 2010
Time-dependent Hartree-Fock calculations for multinucleon transfer processes in 40 , 48 Ca+ 124 Sn, 40 Ca+ 208 Pb, and 58 Ni+ 208 Pb reactions journal July 2013
Damped relaxation techniques to calculate relativistic bound states journal October 1989
Resonating-group method for nuclear many-body problems journal November 1978
A program for coupled-channel calculations with all order couplings for heavy-ion fusion reactions journal December 1999
Three-dimensional unrestricted time-dependent Hartree-Fock fusion calculations using the full Skyrme interaction journal May 2006
Fusion hindrance for Ni 58 + Fe 54 journal July 2010
Microscopic composition of ion-ion interaction potentials journal January 2012
Energy components in energy decomposition analysis (EDA) are path functions; why does it matter? journal January 2020
Momentum Dependence of the Ion-Ion Potential in a Microscopic Theory journal March 1978
Efficient method for estimation of fission fragment yields of r -process nuclei journal June 2020
Zur Theorie der Kernmassen journal July 1935
Microscopic study of noncentral effects in heavy-ion fusion reactions with spherical nuclei journal December 2014
Exclusion principle repulsion effects on the covalent bond beyond the Born–Oppenheimer approximation journal January 2019
Nucleon localization function in rotating nuclei journal October 2020
Defining the contributions of permanent electrostatics, Pauli repulsion, and dispersion in density functional theory calculations of intermolecular interaction energies journal March 2016
Pauli blocking effects in n α -nucleus-induced fusion reactions journal July 2020
The reduced width amplitude in the reaction theory for composite particles journal March 1975
The role of tensor force in heavy-ion fusion dynamics journal July 2018
Cluster formation in precompound nuclei in the time-dependent framework journal December 2017
Hindrance of Heavy-Ion Fusion due to Nuclear Incompressibility journal March 2006
Influence of the tensor force on the microscopic heavy-ion interaction potential journal December 2018
The nucleus-nucleus interaction potential using density-dependent delta interaction journal February 1979
Impact of pear-shaped fission fragments on mass-asymmetric fission in actinides journal December 2018
Microscopic analysis of sub-barrier fusion enhancement in 132 Sn + 40 Ca versus 132 Sn + 48 Ca journal March 2013
Energy dependence of potential barriers and its effect on fusion cross sections journal March 2014
Effect of shell structure on the fission of sub-lead nuclei journal October 2019
TDHF and a Macroscopic Aspect of Low-Energy Nuclear Reactions journal April 2020
Time-dependent Hartree-Fock studies of the dynamical fusion threshold journal January 2012
Nucleon localization and fragment formation in nuclear fission journal December 2016
Microscopic calculation of precompound excitation energies for heavy-ion collisions journal October 2009
Interaction potential between two 16O nuclei derived from the Skyrme interaction journal May 1975
Time-Dependent Hartree-Fock Description of Heavy ions Fusion journal January 2008
A simple measure of electron localization in atomic and molecular systems journal May 1990
The optical potential for the elastic heavy ion scattering journal April 1971
Investigating the nucleus-nucleus potential at very short distances journal November 2003
Influence of the Pauli exclusion principle and the polarization of nuclei on the nuclear part of the interaction potential in the Ca 40 + Ca 40 system journal June 2018
Dynamical effects in fusion with exotic nuclei journal August 2016
Localization and clustering in atomic nuclei journal August 2017
Unexpected Behavior of Heavy-Ion Fusion Cross Sections at Extreme Sub-Barrier Energies journal July 2002
Microscopic Study of 16O-16O Interaction by the Resonating Group Method journal April 1975
Study of Local Inter-Nucleus Potential on the Basis of the Resonating Group Method. IV: Comparison of Various Approaches to CalculateInter-Nucleus Potential and Study of the Originsof Deep and Shallow Potentials journal April 1983
Time-dependent electron localization function journal January 2005
Antisymmetrization effects in heavy ion potentials journal February 1977
The electron localization function (ELF) and its relatives: interpretations and difficulties journal August 2005
New results in low-energy fusion of Ca 40 + Zr 90 , 92 journal July 2017
Multinucleon transfer in O 16 , 18 , F 19 + Pb 208 reactions at energies near the fusion barrier journal August 2016
Neutron transfer dynamics and doorway to fusion in time-dependent Hartree-Fock theory journal July 2008
Beyond the Coherent Coupled Channels Description of Nuclear Fusion journal November 2007
Basis-spline collocation method for the lattice solution of boundary value problems journal April 1991
Probing the production mechanism of neutron-rich nuclei in multinucleon transfer reactions journal January 2020
Density-constrained time-dependent Hartree-Fock-Bogoliubov method journal August 2019
Three-dimensional TDHF calculations for reactions of unstable nuclei journal October 1997
Model for tunneling in many-particle systems journal November 1987
Microscopic approach to coupled-channels effects on fusion journal December 2013
Density-constrained time-dependent Hartree-Fock calculation of 16O + 208Pb fusion cross-sections journal January 2009

Similar Records

Effect of Pauli repulsion and transfer on fusion
Journal Article · Wed Nov 22 00:00:00 EST 2017 · EPJ Web of Conferences · OSTI ID:1820663

Absence of hindrance in a microscopic 12C + 12C fusion study
Journal Article · Wed Aug 21 00:00:00 EDT 2019 · Physical Review C · OSTI ID:1820663

Influence of the tensor force on the microscopic heavy-ion interaction potential
Journal Article · Tue Dec 11 00:00:00 EST 2018 · Physical Review C · OSTI ID:1820663