Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Absence of hindrance in a microscopic 12C + 12C fusion study

Journal Article · · Physical Review C
 [1];  [2];  [3]
  1. Vanderbilt Univ., Nashville, TN (United States); DOE/OSTI
  2. The Australian National Univ., Canberra (Australia)
  3. Vanderbilt Univ., Nashville, TN (United States)

Studies of low-energy fusion of light nuclei are important in astrophysical modeling, with small variations in reaction rates having a large impact on nucleosynthesis yields. Due to the lack of experimental data at astrophysical energies, extrapolation and microscopic methods are needed to model fusion probabilities. To investigate deep sub-barrier 12C+12C fusion cross sections and establish trends for the S factor. Microscopic methods based on static Hartree-Fock and time-dependent Hartree-Fock (TDHF) mean-field theory are used to obtain 12C+12C ion-ion fusion potentials. Fusion cross sections and astrophysical S factors are then calculated using the incoming wave boundary condition method. Both density-constrained frozen Hartree-Fock (DCFHF) and density-constrained TDHF (DC-TDHF) predict a rising S factor at low energies, with DC-TDHF predicting a slight damping in the deep sub-barrier region (≈1 MeV). Comparison between DC-TDHF calculations and maximum experimental cross sections in the resonance peaks are good. However, the discrepancy in experimental low-energy results inhibits interpretation of the trend. Using the fully microscopic DCFHF and DC-TDHF methods, no S factor maximum is observed in the 12C+12C fusion reaction. In addition, no extreme sub-barrier hindrance is predicted at low energies. Furthermore, the development of a microscopic theory of fusion including resonance effects, as well as further experiments at lower energies must be done before the deep sub-barrier behavior of the reaction can be established.

Research Organization:
Vanderbilt Univ., Nashville, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0013847
OSTI ID:
1612036
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 2 Vol. 100; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (88)

N�herungsmethode zur L�sung des quantenmechanischen Mehrk�rperproblems journal January 1930
Effect of tensor force on dissipation dynamics in time-dependent Hartree-Fock theory journal June 2014
Three-dimensional nuclear dynamics in the quantized ATDHF approach journal October 1983
Low energy fusion of 12C + 12C and 16O + 16O systems journal February 1981
A possible quark mechanism for the saturation of nuclear matter journal January 1988
The 12C + 12C sub-coulomb fusion cross section journal May 1977
Semiclassical theory of large amplitude collective excitations journal September 1980
The role of nucleon structure in finite nuclei journal May 1996
A program for coupled-channel calculations with all order couplings for heavy-ion fusion reactions journal December 1999
A Skyrme parametrization from subnuclear to neutron star densities Part II. Nuclei far from stabilities journal May 1998
Absolute cross sections measurement for the 12C + 12C system at astrophysically relevant energies journal November 2006
Spin–orbit splitting and the tensor component of the Skyrme interaction journal March 2007
The role of tensor force in heavy-ion fusion dynamics journal July 2018
Heavy-ion collisions and fission dynamics with the time-dependent Hartree–Fock theory and its extensions journal November 2018
The Wave Mechanics of an Atom with a Non-Coulomb Central Field. Part I. Theory and Methods journal January 1928
An increase in the 12C + 12C fusion rate from resonances at astrophysical energies journal May 2018
Cross section measurements in the 12C+12C system journal January 2017
Heavy ion fusion reactions in stars conference January 2018
CVII. The nuclear surface journal November 1956
Experimental Investigation of the Stellar Nuclear Reaction ^{12}C + ^{12}C at Low Energies journal July 1969
On Nuclear Reactions Occuring in Very Hot STARS.I. the Synthesis of Elements from Carbon to Nickel. journal September 1954
Carbon Flashes in the Heavy-Element Ocean on Accreting Neutron Stars journal October 2001
A Remarkable 3 Hour Thermonuclear Burst from 4U 1820−30 journal February 2002
Long Type I X‐Ray Bursts and Neutron Star Interior Physics journal July 2006
POSSIBLE RESONANCES IN THE 12 C + 12 C FUSION RATE AND SUPERBURST IGNITION journal August 2009
THE 12 C + 12 C REACTION AND THE IMPACT ON NUCLEOSYNTHESIS IN MASSIVE STARS journal December 2012
Three-dimensional TDHF calculations for reactions of unstable nuclei journal October 1997
Clustering effects in reactions induced by light nuclei journal April 2013
Approximate Independence of Optical-Model Elastic Scattering Calculations on the Potential at Small Distances journal August 1964
New Theoretical Approach to Nuclear Heavy-Ion Scattering journal September 1968
Three-dimensional time-dependent Hartree-Fock calculations of O 16 + O 16 and Ca 40 + Ca 40 fusion cross sections journal May 1978
Barrier penetration and spontaneous fission in the time-dependent mean-field approximation journal November 1980
Global and consistent analysis of the heavy-ion elastic scattering and fusion processes journal March 2004
Experimental Measurements of the C 12 + C 12 Nuclear Reactions at Low Energies journal April 1973
Nuclear fusion in dense matter: Reaction rate and carbon burning journal August 2005
Three-dimensional unrestricted time-dependent Hartree-Fock fusion calculations using the full Skyrme interaction journal May 2006
New γ-ray measurements for C 12 + C 12 sub-Coulomb fusion: Toward data unification journal June 2006
Heavy-ion interaction potential deduced from density-constrained time-dependent Hartree-Fock calculation journal August 2006
Dynamical deformation effects in subbarrier fusion of Ni 64 + Sn 132 journal December 2006
Expectations for C 12 and O 16 induced fusion cross sections at energies of astrophysical interest journal January 2007
São Paulo potential as a tool for calculating S factors of fusion reactions in dense stellar matter journal October 2007
Energy dependence of the nucleus-nucleus potential close to the Coulomb barrier journal August 2008
Microscopic calculation of precompound excitation energies for heavy-ion collisions journal October 2009
Fusion of deformed nuclei: C 12 + C 12 journal February 2010
Microscopic study of the Sn 132 , 124 + Zr 96 reactions: Dynamic excitation energy, energy-dependent heavy-ion potential, and capture cross section journal September 2010
Localization in light nuclei journal March 2011
Effects of mutual excitations in the fusion of carbon isotopes journal December 2011
Nuclear energy density optimization: Large deformations journal February 2012
12 C( 16 O, γ ) 28 Si radiative capture: Structural and statistical aspects of the γ decay journal March 2012
Microscopic study of Ca + Ca fusion journal April 2012
Microscopic sub-barrier fusion calculations for the neutron star crust journal May 2012
Microscopic study of 16 O + 16 O fusion journal August 2013
Microscopic approach to coupled-channels effects on fusion journal December 2013
Energy dependence of potential barriers and its effect on fusion cross sections journal March 2014
Microscopic study of noncentral effects in heavy-ion fusion reactions with spherical nuclei journal December 2014
Dependence of the O 16 + O 16 nuclear potential on nuclear incompressibility journal June 2015
Evidence for survival of the α cluster structure in light nuclei through the fusion process journal December 2015
Skyrme tensor force in heavy ion collisions journal May 2016
Multinucleon transfer in O 16 , 18 , F 19 + Pb 208 reactions at energies near the fusion barrier journal August 2016
Dynamical effects in fusion with exotic nuclei journal August 2016
Dependence of fusion on isospin dynamics journal January 2017
How the Pauli exclusion principle affects fusion of atomic nuclei journal March 2017
Cluster formation in precompound nuclei in the time-dependent framework journal December 2017
Reaction rate for carbon burning in massive stars journal January 2018
Characterizing the astrophysical S factor for C 12 + C 12 fusion with wave-packet dynamics journal May 2018
Influence of the tensor force on the microscopic heavy-ion interaction potential journal December 2018
Origin and Consequences of C 12 + C 12 Fusion Resonances at Deep Sub-barrier Energies journal February 2013
Finite Nuclei in the Quark-Meson Coupling Model journal February 2016
Hindrance of Heavy-Ion Fusion due to Nuclear Incompressibility journal March 2006
C 12 + C 12 Fusion Reactions near the Gamow Energy journal March 2007
The mean-field theory of nuclear structure and dynamics journal October 1982
New Theoretical Approach to Nuclear Heavy-Ion Scattering journal October 1970
Density-constrained time-dependent Hartree-Fock calculation of 16O + 208Pb fusion cross-sections journal January 2009
Nuclear quantum many-body dynamics: From collective vibrations to heavy-ion collisions journal November 2012
Time-Dependent Hartree-Fock Description of Heavy ions Fusion journal January 2008
Thermonuclear Reaction Rates, II journal September 1975
Configuration transition effect in heavy-ion fusion reactions with deformed nuclei journal October 2015
Density-constrained time-dependent Hartree-Fock calculation of $^{16}$O+$^{208}$Pb fusion cross sections text January 2008
Energy dependence of nucleus-nucleus potential close to the Coulomb barrier text January 2008
Localization in light nuclei text January 2010
Effects of mutual excitations in the fusion of carbon isotopes text January 2011
Microscopic study of Ca$+$Ca fusion text January 2012
The 12C + 12C reaction and the impact on nucleosynthesis in massive stars text January 2012
Effect of tensor force on dissipation dynamics in time-dependent Hartree-Fock theory text January 2014
Dependence of fusion on isospin dynamics text January 2016
Hindrance of heavy-ion fusion due to nuclear incompressibility text January 2006
The role of nucleon structure in finite nuclei text January 1995
A program for coupled-channels calculations with all order couplings for heavy-ion fusion reactions text January 1999

Cited By (2)

Influence of the tensor interaction on heavy-ion fusion cross sections journal November 2019
Influence of the tensor interaction on heavy-ion fusion cross sections text January 2019

Similar Records

Microscopic study of the fusion reactions 40,48Ca+78Ni and the effect of the tensor force
Journal Article · Mon Feb 28 23:00:00 EST 2022 · Physical Review. C · OSTI ID:1846963

Density constrained TDHF [Book Chapter]
Other · Tue Apr 09 00:00:00 EDT 2019 · OSTI ID:1558093

Dynamic microscopic theory of fusion using DC-TDHF
Journal Article · Sat Oct 20 00:00:00 EDT 2012 · AIP Conference Proceedings · OSTI ID:22075643