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Experimental Solid State Physics

Luminescence Research Laboratory

Research projects
The general theme of our research is the study of point-defects in insulating materials using luminescence methods.  Our current interest concerns the use of time-resolved optical stimulation (TR-OSL) to study dynamics of luminescence processes in quartz and the ultra-sensitive dosimeter, a-Al2O3:C.     We also have projects using thermoluminescence to study luminescence properties of quartz, a-Al2O3:C, ultra-high molecular weight polyethylene and various materials of interest in phosphor research.


15th International Conference on Luminescence and Electron Spin Resonance Dating, Cape Town 2017

http://www.led2017.com


Equipment
? RISØ TL/OSL DA-20 Luminescence Reader
?  Blue (470 nm) LED Time-resolved Luminescence Spectrometer
?  Green (525 nm) LED Time-resolved Luminescence Spectrometer

Group Members
M L Chithambo
S Nsengiyumva
J?el Lontsi Sob
Pontien Niyonzima
Cleophace Seneza
Collaborators

?Professor Vasilis Pagonis, McDaniel College, USA
Research on experimental and modelling studies of time-resolved luminescence processes in quartz on TR-OSL phenomena in quartz and aluminum oxide

?Dr Folorunso Ogundare, University of Ibadan, Nigeria
Collaborative research on experimental and theoretical studies of thermoluminescence and time-resolved luminescence processes in quartz and other geological materials.

?Prof Jim Feathers, University of Washington, Seattle, USA
Development of time-resolved luminescence methods for use in retrospective dosimetry.  

?Prof Marco Martini, Dr Mauro Fasoli, Università di Milano-Bicocca, Milano, Italy
Complementary studies of luminescence dynamics in quartz using time-resolved optical stimulation and radioluminescence methods

?Prof Karl Ramseyer, University Bern, Bern, Switzerland
Research on luminescence lifetimes in low and high-sensitivity natural quartz

News and activities
?      Cleophace Seneza will present a paper on photo-transferred thermoluminescence in a-Al2O3:C at the 5th South African Conference on Photonic Materials, 29 April - 3 May 2013
?      We organised the 3rd International Symposium on Luminescence held in Port Elizabeth, South Africa between 1 – 6 July 2012 (http://jansky.ru.ac.za/~phmc/MC-). This was the third in a series of meetings that started in Bern, Switzerland in 2007. The meetings typically focus on the basic physical processes and materials characteristics of natural and synthetic quartz as used in optically and thermally stimulated luminescence and related techniques.  The symposia are intended for  discussions on contemporary developments in luminescence mechanisms for quartz.  The outcome of the 2007 meeting was a joint review paper  (Preusser, F., Chithambo, M.L., Götte, T., Martini, M., Ramseyer, K., Sendezera, E.J., Susino, G.J. and Wintle, A.G. 2009. Quartz as a natural luminescence dosimeter. Earth-Science Reviews.  97, 196 – 226) which was rated as one of the top 25 papers world-wide in the journal in 2009.

Visitors
?         Mr Luyanda Noto-Male and Ms Puseletso Mokoena, University of the Free State, Bloemfontein, November 2012
?         Prof F Dejene, Mr A Wako and  Mr L F Koad, University of the Free State, Qwa-Qwa campus, April 2013

Funding
We acknowledge with gratitude funding from various sources including the following:
Rhodes University
The National Research Foundation
The Royal Society (UK)
The Third World Academy of Sciences
The Claude Leon Foundation

 

Last Modified :Mon, 25 Apr 2016 11:07:38 SAST