eTheses Repository

New analytical techniques for the investigation of alpha clustering in nuclei

Bailey, Sam Christopher (2017)
Ph.D. thesis, University of Birmingham.

Loading
PDF (19Mb)Accepted Version

Abstract

This thesis presents the analysis of two experiments, one measuring the He-4(N-14,a) and He-4(N-14,d)O-16 reactions and a second measuring the He-4(Ca-40,a), He-4(Ca-44,a) and He-4(Ca-48,a) reactions. These measurements were used to investigate F-18 and Ti-(44,48,52) respectively. In both experiments the Thick Target Inverse Kinematics technique was used and the analysis focused on the investigation of alpha-clustering.

The measurements of He-4(N-14,a) and He-4(N-14,d)O-16 were performed between Ex[F-18] = 5.5 – 16 MeV, and evaluated using a full R-matrix analysis up to 9 MeV. From this nine new states in F-18 were extracted and the alpha-cluster structure of F-18 was explored by comparison with nuclear models.

The measurements of He-4(Ca-40,a), He-4(Ca-44,a) and He-4(Ca-48,a) were made over the ranges Ex[T-44] = 9 – 17 MeV, Ex[Ti-48] = 13.5 – 24 MeV and Ex[Ti-52] = 12 – 20 MeV. The experimental data were analysed using a novel technique developed in this thesis for the identification of fragmented alpha-clustered states, known as the spectral signature analysis. From this analysis nine such states were identified in Ti-44, in good agreement with previous work. None were identified in Ti-48 and three in Ti-52. The implications of these results for alpha-clustering in the fp-shell are discussed.

Type of Work:Ph.D. thesis.
Supervisor(s):Kokalova, Tzany and Freer, Martin
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:Physics and Astronomy
Keywords:nuclear, clustering, alpha, titanium, Ti, fluorine, F, calcium, Ca, nitrogen, N, machine learning, continuous wavelet transform, r-matrix
Subjects:QC Physics
Institution:University of Birmingham
ID Code:7150
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
Export Reference As : ASCII + BibTeX + Dublin Core + EndNote + HTML + METS + MODS + OpenURL Object + Reference Manager + Refer + RefWorks
Share this item :
QR Code for this page

Repository Staff Only: item control page