dc.contributor.author |
Appleby, Graham Arthur |
|
dc.date.accessioned |
2010-11-21T20:53:38Z |
|
dc.date.accessioned |
2022-10-17T22:10:45Z |
|
dc.date.available |
2010-11-21T20:53:38Z |
|
dc.date.available |
2022-10-17T22:10:45Z |
|
dc.date.copyright |
2006 |
|
dc.date.issued |
2006 |
|
dc.identifier.uri |
https://ir.wgtn.ac.nz/handle/123456789/22120 |
|
dc.description.abstract |
The design, characterisation and development of new storage phosphors underpins new high-resolution imaging plates for medical radiography, security and non-destructive testing This thesis describes an experimental study of the properties of materials with potential application in x-ray and thermal neutron imaging plates based on the storage phosphor principle. The properties of known x-ray storage phosphors are first reviewed to background the investigation of new crystalline and glass-ceramic storage phosphors discussed later. An important property of storage phosphors is the depths of electron and hole traps, and a description is given of the design and development of a thermoluminescence spectrometer to measure trap depth. The structure and luminescence of the family of cubic x-ray storage phosphors MxBayXz:Eu2+ (M = Cs or Rb; X = Br or Cl) has been studied and it has been found that Rb2BaCl4:Eu2+, F- has the most promising storage phosphor characteristics. Finally, new thermal neutron storage phosphors are reported which are based on nanocrystallites of BaC12:Eu2+ or BaBr2:Eu2+ storage phosphors contained in a neutron sensitive lithium borate glass matrix. The BaCl2:Eu2+ based glass-ceramics are thermal neutron imaging plates with high neutron sensitivity, low Ƴ-sensitivity, little neutron activation and show potential for higher spatial resolution than commercial neutron imaging plates. |
en_NZ |
dc.format |
pdf |
en_NZ |
dc.language |
en_NZ |
|
dc.language.iso |
en_NZ |
|
dc.publisher |
Te Herenga Waka—Victoria University of Wellington |
en_NZ |
dc.title |
New materials for Radiation imaging |
en_NZ |
dc.type |
Text |
en_NZ |
vuwschema.type.vuw |
Awarded Research Masters Thesis |
en_NZ |
thesis.degree.discipline |
Physics |
en_NZ |
thesis.degree.grantor |
Te Herenga Waka—Victoria University of Wellington |
en_NZ |
thesis.degree.level |
Masters |
en_NZ |
thesis.degree.name |
Doctor of Philosophy |
en_NZ |