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The Model for Luminescence Center Excitation in PbWO_{4}

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Millers D., Grigorjeva L., Chernov S., Pankratov V.

Acta Physica Polonica A

1999

vol. 95

issue 6

971-976

The luminescence and transient absorption of PbWO_{4} crystals were studied. The electron beam (10 ns, E≈270 keV) was used as excitation source. The kinetics of luminescence is complicated - the prompt rise of luminescence intensity is followed by a slow (τ_{r}≈100 ns) rise. The luminescence decay at 80 K is nearly exponential with τ_{d}≈4.0- 4.5 μs. The decay kinetics of transient absorption at 3.5 eV can be described roughly by two exponents with time constants τ_{1}≈100 ns and τ_{2}≈4.0 μs. A common process responsible for absorption relaxation and luminescence rise is suggested. The luminescence center excitation occurs during recombination process via Pb^{2+} excited state formation and subsequent energy transfer to WO_{4}^{2-} group.

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1 Acta Physica Polonica A

1 1999

1 Chernov S.

1 Grigorjeva L.

1 Millers D.

1 Pankratov V.

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The Model for Luminescence Center Excitation in PbWO_{4}