Nuclear shell model and analytical SU(3) description of 28Si

Autor:	Frycz, Dorian Grzegorz
Přispěvatelé:	Menéndez Sánchez, Javier
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Bachelor's thesis Teoria de les capes del nucli Bachelor's theses Models nuclears Treballs de fi de grau Nuclear shell theory Nuclear models
Zdroj:	Dipòsit Digital de la UB Universidad de Barcelona
Popis:	Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2022, Tutor: Javier Menéndez Sánchez We analyze the 28Si nucleus using an analytical SU(3)-based model as well as state of the art numerical shell model calculations. In principle, spherical, oblate and prolate structures can coexist at low energies. However, we found that the spherical shape in 28Si does not survive because the 1d5/2-2s1/2 nearly degenerated doublet gains huge amounts of quadrupole correlations, which favors deformed bands. Although the standard USDB interaction reproduces the oblate ground state and the vibrational band, it fails at establishing a prolate band. A modification of the USDB interaction must be introduced to reproduce the experimental spectrum. Our calculations suggest that the oblate ground state is mostly 0p-0h, whereas the prolate band consists mainly of 4p-4h excitations into the 1d3/2 orbital
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::291914c82283ffa552db6cd638fc0dca http://hdl.handle.net/2445/188691 Zobrazit plný text záznamu