Skip to content

Research at St Andrews

Spectral changes and wavelength dependent thermoluminescence of rare earth ions after X-ray irradiation

Research output: Research - peer-reviewArticle



P. D. Townsend, A. A. Finch, M. Maghrabi, V. Ramachandran, G. V. Vázquez, Y. Wang, D. R. White

School/Research organisations


The thermoluminescence spectra of rare earth doped materials after X-ray irradiation typically vary with the glow peak temperature. Additionally, there are many examples where, for the same dopant ion, the expected component emission lines peak, but at different temperatures. This unusual behaviour is discussed in terms of changes in proximity of coupling between trapping and recombination sites. Changes in the energy barriers for recombination influence alternative routes for charge transfer to rare earth sites which can involve different higher energy states of the rare earth dopants. Proposed mechanisms include selective tunnelling, or barrier crossing, in addition to normal charge transfer from remote trapping sites. The model successfully describes numerous examples in terms of the energy scheme for the rare earth ions. Whilst the standard emission lines are recorded in the glow curve spectra they do not always occur at the same temperature, and, even for the same rare earth dopant, they can differ by as much as 30 °C. These wavelength dependent variations in peak temperature not only offer information on the proximity of trap and recombination sites, but also introduce issues in conventional activation energy analysis when recording is with polychromatic light. The concepts are relevant for related types of measurement, such as optically stimulated thermoluminescence.


Original languageEnglish
Pages (from-to)574-581
Number of pages8
JournalJournal of Luminescence
Early online date22 Jul 2017
StatePublished - Dec 2017

    Research areas

  • Thermoluminescence, Model, Wavelength dependent

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. The evolution of magma during continental rifting: new constraints from the isotopic and trace element signatures of silicic magmas from Ethiopian volcanoes

    Hutchison, W., Mather, T. A., Pyle, D. M., Boyce, A. J., Gleeson, M. L. M., Yirgu, G., Blundy, J. D., Ferguson, D. J., Vye-Brown, C., Millar, I. L., Sims, K. W. W. & Finch, A. A. 9 Mar 2018 In : Earth and Planetary Science Letters. 489, p. 203-218 16 p.

    Research output: Research - peer-reviewArticle

  2. Temperature dependence of bulk luminescence from ZnO

    Cui, M., Zhang, Z., Wang, Y., Finch, A. & Townsend, P. D. 2 Mar 2018 In : Luminescence. Early View

    Research output: Research - peer-reviewArticle

  3. Fenites associated with carbonatite complexes: a review

    Elliott, H. A. L., Wall, F., Chakhmouradian, A. R., Siegfried, P. R., Dahlgren, S., Weatherley, S., Finch, A. A., Marks, M. A. W., Dowman, E. & Deady, E. Feb 2018 In : Ore Geology Reviews. 93, p. 38-59 22 p.

    Research output: Research - peer-reviewReview article

  4. Probing the structural state of Y and Nd in eudialyte using X-ray absorption spectroscopy

    Borst, A. M., Gamaletsos, P., Finch, A. A., Horsburgh, N. J., Friis, H., Kasama, T., Goettlicher, J., Steiniger, R. & Gerakis, K. 10 Jan 2018

    Research output: ResearchPoster

Related by journal

  1. Factors controlling the thermoluminescence spectra of rare earth doped calcium fluoride

    Wang, Y., Zhao, Y., White, D., Finch, A. A. & Townsend, P. D. Apr 2017 In : Journal of Luminescence. 184, p. 55-63 9 p.

    Research output: Research - peer-reviewArticle

  2. Energy dependence of radioluminescence spectra from strontium titanate

    Wang, Y., Zhao, Y., Zhang, Z., Zhao, C., Wu, X., Finch, A. A. & Townsend, P. D. Oct 2015 In : Journal of Luminescence. 166, p. 17-21

    Research output: Research - peer-reviewArticle

  3. Transparent organic light-emitting diodes with different bi-directional emission colors using color-conversion capping layers

    Lee, J., Koh, T-W., Cho, H., Schwab, T., Lee, J-H., Hofmann, S., Lee, J-I., Yoo, S., Leo, K. & Gather, M. C. Jun 2015 In : Journal of Luminescence. 162, p. 180-184

    Research output: Research - peer-reviewArticle

  4. On the spectra luminescence properties of charoite silicate

    Garcia-Guinea, J., Townsend, P. D., Can, N., Correcher, V., Sanchez-Munoz, L., Finch, A. A., Hole, D., Avella, M., Jimenez, J. & Khanlary, M. Mar 2008 In : Journal of Luminescence. 128, p. 403-412 10 p.

    Research output: Research - peer-reviewArticle

ID: 250562847