Tichai, Alexander ; Gebrerufael, Eskendr ; Vobig, Klaus ; Roth, Robert (2018)
Open-shell nuclei from No-Core Shell Model with perturbative improvement.
In: Physics Letters B, 786
doi: 10.1016/j.physletb.2018.10.029
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
We introduce a hybrid many-body approach that combines the flexibility of the No-Core Shell Model (NCSM) with the efficiency of Multi-Configurational Perturbation Theory (MCPT) to compute groundand excited-state energies in arbitrary open-shell nuclei in large model spaces. The NCSM in small model spaces is used to define a multi-determinantal reference state that contains the most important multi-particle multi-hole correlations and a subsequent second-order MCPT correction is used to capture additional correlation effects from a large model space. We apply this new ab initio approach for the calculation of ground-state and excitation energies of even and odd-mass carbon, oxygen, and fluorine isotopes and compare to large-scale NCSM calculations that are computationally much more expensive.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Tichai, Alexander ; Gebrerufael, Eskendr ; Vobig, Klaus ; Roth, Robert |
| Art des Eintrags: | Bibliographie |
| Titel: | Open-shell nuclei from No-Core Shell Model with perturbative improvement |
| Sprache: | Englisch |
| Publikationsjahr: | 2018 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physics Letters B |
| Jahrgang/Volume einer Zeitschrift: | 786 |
| DOI: | 10.1016/j.physletb.2018.10.029 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | We introduce a hybrid many-body approach that combines the flexibility of the No-Core Shell Model (NCSM) with the efficiency of Multi-Configurational Perturbation Theory (MCPT) to compute groundand excited-state energies in arbitrary open-shell nuclei in large model spaces. The NCSM in small model spaces is used to define a multi-determinantal reference state that contains the most important multi-particle multi-hole correlations and a subsequent second-order MCPT correction is used to capture additional correlation effects from a large model space. We apply this new ab initio approach for the calculation of ground-state and excitation energies of even and odd-mass carbon, oxygen, and fluorine isotopes and compare to large-scale NCSM calculations that are computationally much more expensive. |
| Zusätzliche Informationen: | Keywords: Perturbation theory, Ab initio, Many-body theory |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik |
| Hinterlegungsdatum: | 02 Aug 2024 12:38 |
| Letzte Änderung: | 02 Aug 2024 12:38 |
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Verfügbare Versionen dieses Eintrags
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Open-shell nuclei from No-Core Shell Model with perturbative improvement. (deposited 09 Mär 2022 15:22)
- Open-shell nuclei from No-Core Shell Model with perturbative improvement. (deposited 02 Aug 2024 12:38) [Gegenwärtig angezeigt]
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