Callaghan Innovation Research Papers

Back to Research Papers

TitleRare earth size effects on TL
Publication TypeJournal Article
Year of Publication2001
AuthorsTownsend, P.D., Yang B., Raymond S., Karali T., and Maghrabi M.
JournalRadiation Effects and Defects in Solids
Pagination83 - 87
Date Published2001
ISSN10420150 (ISSN)
AbstractLuminescence from rare earth ions provides spectral signatures that identify the type of site. Substitution of the ions in a lattice introduces distortions scaled by the relative size of the host and dopant. For LaF3 or Bi4Ge3O12 several different co-ordination numbers are used; charge compensation is also needed in BaF2, SrF2, CaSO4 etc. When the trapping and recombination sites closely interact, the glow peak temperatures are strongly dependent on the size of the rare earth ion. Three types of pattern are noted with (i) minimal change; (ii) peak shifts scaling with RE ion size over ∼30 degrees or (iii) over 200 degrees from precipitate formation.

Back to top