Issue 25, 2022

Transient optical absorption as a powerful tool for engineering of lead tungstate scintillators towards faster response

Abstract

Transient optical absorption in the pump and probe configuration and the light-induced transient gratings technique is demonstrated to be a useful tool to support time-resolved photoluminescence spectroscopy in studying the processes responsible for timing properties of self-activated scintillating materials. Lead tungstate (PbWO4, PWO) doped by lanthanum and yttrium up to high concentrations of 1500 ppm was studied as a prospective scintillator for fast timing applications in high energy physics. Strong localization of nonequilibrium carriers at radiative recombination centers of one type is evidenced, and the observed acceleration of the luminescence decay in heavily doped PWO is interpreted in view of the inequivalent surrounding of the oxyanionic complexes WO42− acting as radiative recombination centers together with dipole–dipole interaction between excited complexes at high levels of excitation.

Graphical abstract: Transient optical absorption as a powerful tool for engineering of lead tungstate scintillators towards faster response

Supplementary files

Article information

Article type
Paper
Submitted
08 4 2022
Accepted
28 5 2022
First published
30 5 2022

J. Mater. Chem. C, 2022,10, 9521-9529

Transient optical absorption as a powerful tool for engineering of lead tungstate scintillators towards faster response

G. Tamulaitis, S. Nargelas, M. Korjik, V. Mechinsky, Y. Talochka, A. Vaitkevičius and A. Vasil’ev, J. Mater. Chem. C, 2022, 10, 9521 DOI: 10.1039/D2TC01450E

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