Application of relativistic density functionals in the modeling of nuclear weak-interaction processes

doctoral thesis

• Title (croatian): Primjena relativističkih funkcionala gustoće u procesima slabog međudjelovanja u atomskim jezgrama
• Author: Tomislav Marketin
• Mentor: Dario Vretenar (mentor)
• Committee member: Nils Paar (predsjednik povjerenstva)
• Committee member: Dario Vretenar (član povjerenstva)
• Committee member: Suzana Szilner (član povjerenstva)
• Committee member: Peter Ring (član povjerenstva)
• Committee member: Matko Milin (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Physics); Zagreb
• Defense date and country: 2010-12-07, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics
• Universal decimal classification (UDC): 53 - Physics

Abstract

Relativistic density functionals are employed in a study of weak-interaction processes in atomic nuclei. The approach is based on the relativistic Hartree-Bogoliubov (RHB) model that is used to compute the self-consistent nuclear ground state, and collective excited states are modeleld with the relativistic quasiparticle random phase approximation (RQRPA).The focus of the study is the calculation of β-decay half-lives of neutron-rich nuclei that are predicted to play a role in r-process nucleosynthesis, and their comparison to available experimental values. The model is also applied to the description of charged lepton capture and neutrino capture. This study provides a microscopic description of weak-interaction processes in nuclei, based of modern nuclear energy density functional concepts, and results contribute to a better understanding of the origin of elements heavies than iron.

Abstract (croatian)

Relativistički funkcionali gustoće upotrijebljeni su za proučavanje procesa slabog međudjelovanja u atomskim jezgrama. Pristup se temelji na relativističkom Hartree-Bogoljubov (RHB) modelu koji daje samosuglasno osnovno stanje jezgre, a kolektivna pobuđenja modelirana su sa relativističkom kvazičestičnom aproksimacijom slučajnih faza (RQRPA). Središnja tema rada je proračun vremena poluživota pri β raspadu jezgara bogatih neutronima za koje je predviđeno da sudjeluju u r-procesu nukleosinteze, te njihova usporedba sa dostupnim eksperimentalnim vrijednostima. Model je također primijenjen na opis uhvata nabijenog leptona i uhvata neutrina. Ova radnja predstavlja mikroskopski opis procesa slabog međudjelovanja u jezgrama, temeljen na modernim konceptima funkcionala gustoće energije, a rezultati doprinose boljem razumijevanju porijekla elemenata težih od željeza.

• Keywords: weak interaction; atomic nuclei; relativistic Hartree-Bogoliubov model; RHB model; RQRPA
• Keywords (croatian): slaba međudjelovanja; atomske jezgre; relativistički Hartree-Bogoljubov model; RHB model; RQRPA
• Language: english
• URN:NBN: urn:nbn:hr:217:658125
• Study programme: Title: Physics; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika (doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika)
• Type of resource: Text
• Extent: 117 str.
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-08-24 07:18:50