Extensions to the No-Core Shell Model : Importance-Truncation, Regulators and Reactions

Extensions to the No-Core Shell Model presents three extensions to the No-Core Shell Model (NCSM) that allow for calculations of heavier nuclei, specifically for the p-shell nuclei. The Importance-Truncated NCSM (IT-NCSM) formulated on arguments of multi-configurational perturbation theory selects a...

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Autor Principal: Kruse, Michael Karl Gerhard
Formato: Livre numérique
Idioma:Anglais
Publicado: Cham : Springer International Publishing : Springer e-books : Imprint: Springer : Springer e-books [20..].
Cham : Springer Nature
Series:Springer Theses, Recognizing Outstanding Ph.D. Research
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Edition sous un autre format:• Extensions to the No-Core Shell Model, Texte imprimé, 9783319013923
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245 1 0 |a Extensions to the No-Core Shell Model :  |b Importance-Truncation, Regulators and Reactions   |c by Michael Karl Gerhard Kruse. 
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500 |a Archives Springer e-books (Licence nationale) 
505 0 |a Introduction to Low-Energy Nuclear Physics -- The No Core Shell Model -- Importance Truncated No Core Shell Model -- UV and IR Properties of the NCSM -- Extending the NCSM with the RGM -- Conclusion 
506 |a Accès en ligne pour les établissements français bénéficiaires des licences nationales 
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506 |a Conditions particulières de réutilisation pour les bénéficiaires des licences nationales. https://www.licencesnationales.fr/springer-nature-ebooks-contrat-licence-ln-2017 
520 |a Extensions to the No-Core Shell Model presents three extensions to the No-Core Shell Model (NCSM) that allow for calculations of heavier nuclei, specifically for the p-shell nuclei. The Importance-Truncated NCSM (IT-NCSM) formulated on arguments of multi-configurational perturbation theory selects a small set of basis states from the initially large basis space in which the Hamiltonian is diagonalized. Previous IT-NCSM calculations have proven reliable, however, there has been no thorough investigation of the inherent error in the truncated IT-NCSM calculations. This thesis provides a detailed study of IT-NCSM calculations and compares them to full NCSM calculations to judge the accuracy of IT-NCSM in heavier nuclei. When IT-NCSM calculations are performed, one often needs to extrapolate the ground-state energy from the finite basis (or model) spaces to the full NCSM model space. In this thesis a careful investigation of the extrapolation procedures was performed. On a related note, extrapolations in the NCSM are commonplace, but up to recently did not have the ultraviolet (UV) or infrared (IR) physics under control. This work additionally presents a method that maps the NCSM parameters into an effective-field theory inspired framework, in which the UV and IR physics are treated appropriately. The NCSM is well-suited to describe bound-state properties of nuclei, but is not well-adapted to describe loosely bound systems, such as the exotic nuclei near the neutron drip line. With the inclusion of the Resonating Group Method (RGM), the NCSM / RGM can provide a first-principles description of exotic nuclei and the first extension of the NCSM 
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