NUCLEAR EQUATION OF STATE IN A FORM SUITABLE FOR QUANTUM MOLECULAR DYNAMICS

2010 ◽  
Vol 19 (04) ◽  
pp. 759-767 ◽  
Author(s):  
ZBIGNIEW SOSIN
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Equation Of State ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Neutron Skin ◽  
Quantum Molecular Dynamics ◽  
Preliminary Results ◽  
Nuclear Equation Of State

The equation of state (EOS) in a form suitable for calculation in the model of quantum molecular dynamics (QMD) is presented. Using the proposed form of the EOS, different properties of nuclei such as ground state energy, nuclear radii and neutron skin could be calculated. The preliminary results of calculations are compared with the experimental data.

scholarly journals Measurement of the sound velocity of shock compressed water

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hua Shu ◽  
Jiangtao Li ◽  
Yucheng Tu ◽  
Junjian Ye ◽  
Junyue Wang ◽  
...  
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Equation Of State ◽  
Liquid Water ◽  
Diamond Anvil Cell ◽  
Quantum Molecular Dynamics ◽  
Laser Shock ◽  
Diamond Anvil ◽  
Ionization Processes ◽  
Sound Velocities

AbstractThe sound velocities of water in the Hugoniot states are investigated by laser shock compression of precompressed water in a diamond anvil cell. The obtained sound velocities in the off-Hugoniot region of liquid water at precompressed conditions are used to test the predictions of quantum molecular dynamics (QMD) simulations and the SESAME equation-of-state (EOS) library. It is found that the prediction of QMD simulations agrees with the experimental data while the prediction of SESAME EOS library underestimates the sound velocities probably due to its improper accounting for the ionization processes.

Liquid 4He: Equation of State, Compressibility and Velocity of First Sound

1998 ◽  
Vol 12 (21) ◽  
pp. 2115-2127 ◽  
Author(s):  
B. Skjetne ◽  
E. Østgaard
Keyword(s):  
Wave Function ◽  
Equation Of State ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Experimental Results ◽  
Interaction Models ◽  
First Sound ◽  
Polynomial Expression ◽  
Theoretical Results

In calculations for liquid 4 He , an investigation is made to check the accuracy of a lowest-order constrained variational (LOCV) method, using modified "healing" conditions on the two-body Jastrow wave function. Results obtained for the ground-state energy for four different interaction models are fitted by a polynomial expression, whereby the pressure, compressibility and velocity of first sound are obtained. The theoretical results are found to be in fair agreement with experimental results.

scholarly journals Nuclear Equation of State in the Relativistic Point-Coupling Model Constrained by Excitations in Finite Nuclei

Universe ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 71
Author(s):  
Esra Yüksel ◽  
Tomohiro Oishi ◽  
Nils Paar
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Energy Density ◽  
Symmetry Energy ◽  
Ground State ◽  
Density Functional ◽  
Dipole Polarizability ◽  
Energy Density Functional ◽  
Nuclear Equation Of State ◽  
Ground State Properties

Nuclear equation of state is often described in the framework of energy density functional. However, the isovector channel in most functionals has been poorly constrained, mainly due to rather limited available experimental data to probe it. Only recently, the relativistic nuclear energy density functional with an effective point-coupling interaction was constrained by supplementing the ground-state properties of nuclei with the experimental data on dipole polarizability and isoscalar monopole resonance energy in 208Pb, resulting in DD-PCX parameterization. In this work, we pursue a complementary approach by introducing a family of 8 relativistic point-coupling functionals that reproduce the same nuclear ground-state properties, including binding energies and charge radii, but in addition have a constrained value of symmetry energy at saturation density in the range J = 29, 30, …, 36 MeV. In the next step, this family of functionals is employed in studies of excitation properties such as dipole polarizability and magnetic dipole transitions, and the respective experimental data are used to validate the optimal choice of functional as well as to assess reliable values of the symmetry energy and slope of the symmetry energy at saturation.

MULTIFRAGMENTATION AND FRAGMENT FLOW

1988 ◽  
Vol 03 (05) ◽  
pp. 459-464 ◽  
Author(s):  
G. PEILERT ◽  
A. ROSENHAUER ◽  
H. STÖCKER ◽  
W. GREINER ◽  
J. AICHELIN
Keyword(s):  
Phase Transition ◽  
Molecular Dynamics ◽  
Equation Of State ◽  
Vapour Phase ◽  
Quantum Molecular Dynamics ◽  
Medium Effects ◽  
Fragment Mass ◽  
Nuclear Equation Of State ◽  
Enhanced Sensitivity ◽  
Fragment Formation

Multifragmentation is studied for the system 197Au (200 A MeV)+197Au in the Quantum Molecular Dynamics approach. We find that the fragment mass distribution exhibits a power law behaviour with an exponent τ=−2.3. Time and impact parameter dependence of the fragment formation and their implications for the conjectured liquid-vapour phase-transition are investigated. We show that different fragment mass intervals populate different rapidity regions. The transverse momentum flow per nucleon increases with fragment mass in agreement with recent data, and exhibits for A≥4, a strongly enhanced sensitivity to the nuclear equation of state. In-medium effects reduce the fragment flow. The data indicate a stiff equation of state.

The ground state energy of the ±J spin glass from the genetic algorithm

1994 ◽  
Vol 4 (9) ◽  
pp. 1281-1285 ◽  
Author(s):  
P. Sutton ◽  
D. L. Hunter ◽  
N. Jan
Keyword(s):  
Genetic Algorithm ◽  
Spin Glass ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy
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