Callaghan Innovation Research Papers

Back to Research Papers

TitleStructural and scintillation properties of cerium-doped Ba 1-xlaxCl2+x ceramics
Publication TypeJournal Article
Year of Publication2008
AuthorsEdgar, A., Bartle M., Raymond S.G., Williams G.V.M., and Varoy C.
JournalIEEE Transactions on Nuclear Science
Pagination1160 - 1163
Date Published2008
ISSN00189499 (ISSN)
KeywordsBarium, Cerium, Cerium compounds, Scintillation properties, Structural properties
AbstractA series of cerium-doped compounds with the composition Ba 1-xLaxCl2+x and 0 < × < 0.5 have been prepared in ceramic form. We find from the powder X-ray diffraction patterns that the compounds adopt the cubic fluorite structure for 0.05 < × < 0.34. Samples with × ∼ 0.2 are translucent. When doped with trivalent cerium, the materials show photoluminescence emission peaks at 350, 372 nm (for the Ba0.66La0.34Cl2.34 composition); the photoluminescence decay can be fitted with a single exponential with decay time 25 ns. The scintillation pulse height analysis shows a photopeak for 137Cs which can be used to compute a light yield of 4000 photons/MeV. The scintillation decay is non-exponential, with a rapid initial decay which can be represented approximately by a decay constant of ∼100 ns, but there is a substantial delayed scintillation which extends over several microseconds. © 2008 IEEE.

Back to top