Typel, Stefan (2020)
Clusters as surrogate for explicit short-range correlations in relativistic mean-field models.
In: The European Physical Journal Special Topics, 229 (22-23)
doi: 10.1140/epjst/e2020-000060-6
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The formation of clusters at sub-saturation densities in nuclear matter can be seen as a result of many-body correlations. Various theoretical models have been developed to take this effect into account, mostly on a phenomenological level using energy density functionals. These models are constructed in such a way that clusters appear solely in dilute matter and dissolve when the density approaches the nuclear saturation density. At higher densities only nucleons survive as quasi-particles and no explicit correlations between the constituents of nuclear matter are considered. The possible description of correlations with cluster degrees of freedom at supra-saturation densities is explored using the example of a quasi-deuteron in a generalized relativistic density functional. The required change in the density dependence of the cluster mass shift, responsible for describing the cluster dissolution in the present model, is derived for nuclear matter at zero temperature.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Typel, Stefan |
| Art des Eintrags: | Bibliographie |
| Titel: | Clusters as surrogate for explicit short-range correlations in relativistic mean-field models |
| Sprache: | Englisch |
| Publikationsjahr: | 21 Dezember 2020 |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The European Physical Journal Special Topics |
| Jahrgang/Volume einer Zeitschrift: | 229 |
| (Heft-)Nummer: | 22-23 |
| DOI: | 10.1140/epjst/e2020-000060-6 |
| Kurzbeschreibung (Abstract): | The formation of clusters at sub-saturation densities in nuclear matter can be seen as a result of many-body correlations. Various theoretical models have been developed to take this effect into account, mostly on a phenomenological level using energy density functionals. These models are constructed in such a way that clusters appear solely in dilute matter and dissolve when the density approaches the nuclear saturation density. At higher densities only nucleons survive as quasi-particles and no explicit correlations between the constituents of nuclear matter are considered. The possible description of correlations with cluster degrees of freedom at supra-saturation densities is explored using the example of a quasi-deuteron in a generalized relativistic density functional. The required change in the density dependence of the cluster mass shift, responsible for describing the cluster dissolution in the present model, is derived for nuclear matter at zero temperature. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik > Kernphysik und Nukleare Astrophysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik > Kern- und Vielteilchenphysik |
| Hinterlegungsdatum: | 13 Jul 2022 07:17 |
| Letzte Änderung: | 27 Dez 2022 09:18 |
| PPN: | 503197769 |
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