Laboratory Tests of Low Density Astrophysical Equations of State

Abstract

Clustering in low density nuclear matter has been investigated using the NIMROD multi-detector at Texas A&M University. Thermal coalescence modes were employed to extract densities, $\rho$, and temperatures, $T$, for evolving systems formed in collisions of 47 $A$ MeV ${}^{40}$Ar + ${}^{112}$Sn,${}^{124}$Sn and ${}^{64}$Zn + ${}^{112}$Sn, ${}^{124}$Sn. The yields of $d$, $t$, ${}^3$He, and ${}^4$He have been determined at $\rho$ = 0.002 to 0.032 nucleons/fm${}^3$ and $T$= 5 to 10 MeV. The experimentally derived equilibrium constants for $\alpha$ particle production are compared with those predicted by a number of astrophysical equations of state. The data provide important new constraints on the model calculations.

5 pages, 3 figures

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• Symmetry energy of dilute warm nuclear matter
• Light nuclei quasiparticle energy shift in hot and dense nuclear matter
• Experimental determination of the symmetry energy of a low density nuclear gas
• A Second Relativistic Mean Field and Virial Equation of State for Astrophysical Simulations
• Appearance of Light Clusters in Post-bounce Evolution of Core-Collapse Supernovae
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• Probing the symmetry energy from the nuclear isoscaling

Cited by in corpus (62)

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• The many facets of the (non relativistic) Nuclear Equation of State
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• Towards a Unified Quark-Hadron Matter Equation of State for Applications in Astrophysics and Heavy-Ion Collisions
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• Nucleon self-energies for supernova equations of state
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• Thermodynamic properties and shear viscosity over entropy density ratio of nuclear fireball in a quantum-molecular dynamics model
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• Light Clusters and Pasta Phases in Warm and Dense Nuclear Matter
• Dense Matter in Neutron Stars with eXTP
• Light cluster production at NICA
• Equilibrium constants of Hydrogen and Helium isotopes at low nuclear densities
• Medium modifications for light and heavy nuclear clusters in simulations of core collapse supernovae -- Impact on equation of state and weak interactions
• Clustering structure effect on Hanbury-Brown-Twiss correlation in ${}^{12}$C + ${}^{197}$Au collisions at 200 GeV}
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• Density determinations in heavy ion collisions
• Understanding the symmetry energy using data from the ALADIN-2000 Collaboration taken at the GSI Large Neutron Detector
• Studies of the equation-of-state of nuclear matter by heavy-ion collisions at intermediate energy in the multi-messenger era
• Heavy-ion Collisions: Direct and indirect probes of the density and temperature dependence of Esym
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• Embedding short-range correlations in relativistic density functionals through quasi-deuterons
• Coulomb corrections to density and temperature in heavy ion collisions
• Light clusters in dilute heavy-baryon admixed nuclear matter
• Improved method for the experimental determination of in-medium effects from heavy-ion collisions
• Light clusters in warm stellar matter: calibrating the cluster couplings
• Effects of the $\alpha$-cluster structure and the intrinsic momentum component of nuclei on the longitudinal asymmetry in relativistic heavy-ion collisions
• Medium effects on freeze-out of light clusters at NICA energies
• Employing ternary fission of ${}^{242}$Pu as a probe of very neutron rich matter
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• Competition between fermions and bosons in nuclear matter at low densities and finite temperatures
• Statistical treatment of nuclear clusters in the continuum
• Equation of state in neutron stars and supernovae
• Influence of the tetraneutron on the EoS under core-collapse supernovae and heavy-ion collisions conditions
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• Investigation of the nuclear liquid-gas phase transition in the static AMD
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• Phase-space excluded-volume approach for light clusters in nuclear medium
• Light clusters as a possible source of crustal impurities: a quasi-particle approach
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• Influence of Cluster Configurations and Nucleon--Nucleon Scattering Cross-Section on Stopping Power in Heavy-Ion Collisions
• Heavy baryons in hot stellar matter with light nuclei and hypernuclei
• Medium effects on light clusters from heavy-ion collisions within a relativistic mean-field description
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