Time-resolved luminescence of low sensitivity quartz from crystalline rocks

Chithambo, M.L. and Preusser, F. and Ogundare, F.O. (2007) Time-resolved luminescence of low sensitivity quartz from crystalline rocks. Radiation Measurements, 42 (2). pp. 205-212. ISSN 1350-4487

[img]
Preview
Text
chitambo_time_resolved.pdf

460Kb

Official URL: http://dx.doi.org/10.1016/j.radmeas.2006.07.005

Abstract

Time-resolved luminescence spectra of low sensitivity natural quartz from crystalline rocks are presented. The luminescence was pulse-stimulated at width using 470 nm blue light from quartz separated from plutonic, metamorphic, volcanic and hydrothermal samples. Measurements were made at 20 °C. All samples show evidence of a short lifetime component less than long although in several cases too weak in intensity to be evaluated accurately. On the other hand, the value of the principal lifetime component varies considerably being about in metamorphic quartz, in plutonic quartz, and in one example of hydrothermal quartz. The results illustrate a new feature of luminescence from quartz for which lifetimes less than or greater than have never been reported at room temperature before. It is argued that the thermal provenance of the quartz and so the annealing it will have experienced influences the size of the observed lifetime. In particular, the results are explained in terms of a model consisting of three luminescence centers with the dominant lifetime linked to preferential recombination at one center depending on the thermal history of the sample and hence the hole concentration of the center.

Item Type:Article
Uncontrolled Keywords:Luminescence lifetimes; Crystalline quartz
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Physics & Electronics
ID Code:698
Deposited By: Mrs Eileen Shepherd
Deposited On:23 Nov 2007
Last Modified:06 Jan 2012 16:18
379 full-text download(s) since 23 Nov 2007
101 full-text download(s) in the past 12 months
More statistics...

Repository Staff Only: item control page