Luminescence properties of lanthanide doped alkaline earth chlorides under (V)UV and X-ray excitation

作者：Zych Aleksander^*; Leferink op Reinink Anke; van der Eerden Koen; Donega Celso de Mello; Meijerink Andries

来源：Journal of Alloys and Compounds, 2011, 509(13): 4445-4451.

DOI：10.1016/j.jallcom.2011.01.120

• Rare earth alloys and compounds
• Synchrotron radiation
• Luminescence
• Insulators

The photoluminescence and radioluminescence of Ce3+, Pr3+ and Nd3+ in SrCl2 and BaCl2 are reported and discussed in relation to application as a (fast) scintillator material. The Ce3+ doped materials exhibit the typical fast cerium d-f emission (358, 382 nm in SrCl2 and 350,375 nm in BaCl2) both under synchrotron and ionizing radiation excitations. A weak afterglow is observed. For Pr3+ a very fast d-f emission is observed in SrCl2 (250, 263, 300 and 328 nm, tau = 13 ns) and BaCl2 (260, 288 and 315 nm, tau = 10 ns), but only under direct f-d excitation. No d-f luminescence is observed for Pr3+ under X-ray excitation. The absence of d-f emission is explained by the energy of the host lattice emission which is too low for energy transfer to the high energy fd states of Pr3+ (230 nm in SrCl2 and 235 nm in BaCl2). The neodymium doped chlorides do not show d-f luminescence.

• 出版日期2011-3-31