Point defects and the pre-dose effect in natural quartz

✍ Scribed by S.W.S. McKeever; C.Y. Chen; L.E. Halliburton

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 447 KB
• Volume: 10
• Category: Article
• ISSN: 0735-245X
• DOI: 10.1016/0735-245x(85)90047-x

✦ Synopsis

As part of a study to define more precisely the 'pre-dose effect' in natural quartz, we have used thermoluminescence (TL) and electron spin resonance (ESR) in an attempt to identify the defects responsible for the 100°C TL peak. The samples used were found to contain aluminum, germanium, titanium, lithium and hydrogen impurities. Correlations were made between the size of the TL peak following a series of irradiations at room temperature and at -196°C, and ESR signals produced following a similar series of irradiations. Additionally, isothermal decay measurements of both the TL and the ESR at room temperature were made. The results suggest that electrons are released from Ge 4+ -e-centers to recombine at AI 3+ -h ÷ centers and at unidentified hole centers to produce TL at 100°C, with wavelengths of 470 and 380 nm, respectively.