Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (2): S20502 doi: 10.13538/j.1001-8042/nst.26.S20502

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2014)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2014) • Previous Articles     Next Articles

Effect of an electron gas on a neutron-rich nuclear pasta

Jorge Alberto López and Enrique Ramírez-Homs   

  1. Department of Physics, University of Texas at El Paso, El Paso, Texas 79968, USA
  • Contact: Jorge Alberto López E-mail:jorgelopez@utep.edu
  • Supported by:

    Supported by National Science Foundation – Physics (No. 1066031) and
    the China-US Theory Institute for Physics with Exotic Nuclei

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Jorge Alberto López and Enrique Ramírez-Homs. Effect of an electron gas on a neutron-rich nuclear pasta.Nuclear Science and Techniques, 2015, 26(2): S20502     doi: 10.13538/j.1001-8042/nst.26.S20502

Abstract:

We studied the role that electron gas has on the formation of nuclear structures at subsaturation densities and
low temperatures (T < 1 MeV). Using a classical molecular dynamics model we studied isospin symmetric and
asymmetric matter at subsaturation densities and low temperatures varying the Coulomb interaction strength.
The effect of such variation was quantified on the fragment size multiplicity, the inter-particle distance, the
isospin content of the clusters, the nucleon mobility and cluster persistence, and on the nuclear structure shapes.
We found that the presence of an electron gas distributes matter more evenly, disrupts the formation of larger
objects, reduces the isospin content, and modifies the nucleon average displacement, but does not affect the
inter-nucleon distance in clusters. The nuclear structures are also found to change shapes by different degrees
depending on their isospin content, temperature and density.

Key words: Electron gas, Molecular dynamics, Neutron rich matter, Nuclear pasta