<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-22T08:43:59Z</responseDate><request verb="GetRecord" identifier="oai:www.repository.cam.ac.uk:1810/287465" metadataPrefix="uketd_dc">https://api.repository.cam.ac.uk/server/oai/request</request><GetRecord><record><header><identifier>oai:www.repository.cam.ac.uk:1810/287465</identifier><datestamp>2021-04-21T19:15:01Z</datestamp><setSpec>com_1810_205871</setSpec><setSpec>com_1810_256064</setSpec><setSpec>col_1810_206446</setSpec></header><metadata><uketd_dc:uketddc xmlns:uketd_dc="http://naca.central.cranfield.ac.uk/ethos-oai/2.0/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:uketdterms="http://naca.central.cranfield.ac.uk/ethos-oai/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://naca.central.cranfield.ac.uk/ethos-oai/2.0/ http://naca.central.cranfield.ac.uk/ethos-oai/2.0/uketd_dc.xsd">
   <dc:title>B=4N Nuclei in the Skyrme Model</dc:title>
   <dc:identifier xsi:type="dcterms:DOI">10.17863/CAM.34770</dc:identifier>
   <dc:creator>King, Christopher</dc:creator>
   <uketdterms:advisor>Manton, Nick</uketdterms:advisor>
   <dcterms:abstract>The Skyrme model enables us to approximate nuclei via topological solitons known
as Skyrmions. The B = 4 Skyrmion is of particular importance as its symmetry
and stability means that multiple B = 4 Skyrmions can combine with each other to
form larger B = 4N Skyrmions. In this thesis we investigate the properties of these
B = 4N Skyrmions and compare them with results found in the wider nuclear physics
community.
We go beyond rigid body quantization and develop a formalism of using vibrational
quantisation to generate the energy spectrum of the Oxygen−16 nucleus. The
Oxygen−16 nucleus is treated as an arrangement of four B = 4 Skyrmions, whose
dynamics enable us to create a 2−dimensional manifold of B = 16 configurations. We
solve the Schrödinger equation on this manifold and discover new states previously not
found in the B = 16 sector of the Skyrme model. We compare these states with those
found experimentally and find that there is a excellent it to the energy spectrum.
In order to apply vibrational quantization to a wider range of nuclei we create a
novel approximation for Skyrmions and the interactions between them. By generating
Skyrmions with Gaussian sources we find analytic expressions for the pion fields and
interaction energies of Skyrmions, with particular focus on the B = 1 and B = 4
Skyrmions, and show how this could be applied to vibrational quantization and the
clustering of B = 4 Skyrmions.
B = 4N nuclei are the only nuclei with zero spin and isospin, which means that
their electric charge density is proportional to their baryon density. This simplification
makes these nuclei particularly susceptible to investigation via electron scattering. We
develop a classical averaging method to calculate the Patterson function and the form
factor for a B = 4N nucleus and make comparisons with experimental data. We also
discover a way of using the baryon density directly to approximate the locations of
zeroes and stationary points of the form factor.</dcterms:abstract>
   <uketdterms:institution>University of Cambridge</uketdterms:institution>
   <dcterms:issued>2019-01-26</dcterms:issued>
   <dc:type>Thesis</dc:type>
   <uketdterms:qualificationlevel>Doctoral</uketdterms:qualificationlevel>
   <uketdterms:qualificationname>Doctor of Philosophy (PhD)</uketdterms:qualificationname>
   <dc:language>en</dc:language>
   <dcterms:isReferencedBy xsi:type="dcterms:URI">https://www.repository.cam.ac.uk/handle/1810/287465</dcterms:isReferencedBy>
   <dc:identifier xsi:type="dcterms:URI">https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/9d02a136-e1a0-4e90-9cfd-03188d9b6587/download</dc:identifier>
   <uketdterms:checksum xsi:type="uketdterms:MD5">0f0ab6854dcbc5f8d8dcbe3e71e5bbc9</uketdterms:checksum>
   <dcterms:license>https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/a71a4f22-12e2-404b-82b6-10436d30c9a3/download</dcterms:license>
   <uketdterms:checksum xsi:type="uketdterms:MD5">87eda9de84448d1f82354d60eee3eb5f</uketdterms:checksum>
   <dc:rights>https://www.rioxx.net/licenses/all-rights-reserved/</dc:rights>
   <dc:subject>Skyrmions</dc:subject>
   <dc:subject>Vibrational Quantisation</dc:subject>
   <dc:subject>Nuclear Interactions</dc:subject>
</uketd_dc:uketddc>
</metadata></record></GetRecord></OAI-PMH>