Modeling and Simulation of Two-Step Resonance Ionization Processes using CW and Pulsed Lasers
Een belangrijke observatie in de kernfysica is dat er kernen zijn met een bepaalde configuratie van protonen en neutronen dieervoor zorgen dat ze opmerkelijke eigenschappen hebben. Deze kernen worden met de naam ‘magische kernen’ aangeduid envormen de hoeksteen van ons theoretisch begrip van de kernfysica. Een belangrijke open vraag binnen het hedendaagse on-derzoek is in hoeverre onze kennis over de gemakkelijk bestudeerbare magische kernen mag veralgemeend worden naar meerexotische kernen. Dergelijke exotische kernen zijn vaak heel kortlevend en moeilijk te produceren, wat het onderzoek natuurlijkmoeilijker maakt. Recent werd er in CERN een nieuw experiment ontwikkeld om eigenschappen van die exotische kernen te bestuderen. Ditexperiment berust op het gebruik van lasers om de fijnere details van de kernstructuur te ontrafelen. Om dat op een nauwkeurigeen precieze manier te doen moet natuurlijk volledig in kaart gebracht worden hoe die lasers precies inwerken op de atomen.Het is op dit moment dat deze thesis op de voorgrond komt. Vertrekkende van de basiswetten van de kwantummechanicagaat deze thesis dieper in op de laser-atoom interacties met als duidelijk doel de toepassing in de nucleaire laserspectroscopie. Essentieel bevat deze thesis twee resultaten. Een eerste is dat de interacties van de lasers en atomen ervoor kunnen zorgendat de parameters die uit een experiment worden gedestilleerd kunnen afwijken van hun eigenlijke, echte waarde. Enige voor-zichtigheid is dus geboden bij het kiezen van de experimentele condities. Een tweede resultaat bestaat uit een beschrijving eneen theoretische onderbouwing van een nieuwe methode waarmee zowel de precisie als de nauwkeurigheid van de experi-mentele techniek in principe significant verbeterd zou kunnen worden. Beide resultaten werden experimenteel gestaafd.
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