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Light and heavy clusters in warm stellar matter

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Abstract

Light and heavy clusters are calculated for warm stellar matter in the framework of relativistic mean-field models, in the single-nucleus approximation. The cluster abundances are determined from the minimization of the free energy. In-medium effects of light cluster properties are included by introducing an explicit binding energy shift analytically calculated in the Thomas–Fermi approximation, and the coupling constants are fixed by imposing that the virial limit at low density is recovered. The resulting light cluster abundances come out to be in reasonable agreement with constraints at higher density coming from heavy-ion collision data. Some comparisons with microscopic calculations are also shown.

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Author information

Authors and Affiliations

  1. CFisUC, Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal

    Helena Pais & Constança Providência

  2. LPC (CNRS/ENSICAEN/Université de Caen Normandie), UMR6534, 14050, Caen Cédex, France

    Francesca Gulminelli

  3. Institut für Physik, Universität Rostock, 18051, Rostock, Germany

    Gerd Röpke

  4. National Research Nuclear University (MEPhI), Moscow, Russia, 115409

    Gerd Röpke

Authors
  1. Helena Pais
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  2. Francesca Gulminelli
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  3. Constança Providência
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  4. Gerd Röpke
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Corresponding author

Correspondence to Helena Pais.

Additional information

This work was partly supported by the FCT (Portugal) Project No. UID/FIS/04564/2016 and by former NewCompStar, COST Action MP1304. H.P. is supported by FCT (Portugal) under Project No. SFRH/BPD/95566/2013. She is very thankful to the Organizers of IWND 2018 for the opportunity to present this work, as well as the financial support received.

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Pais, H., Gulminelli, F., Providência, C. et al. Light and heavy clusters in warm stellar matter. NUCL SCI TECH 29, 181 (2018). https://doi.org/10.1007/s41365-018-0518-6

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  • DOI: https://doi.org/10.1007/s41365-018-0518-6

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