Doping mechanism of heavily doped PbWO4: La3+ Article

Zhu, WL, Feng, XQ, Huang, YL et al. (2002). Doping mechanism of heavily doped PbWO4: La3+ . 193(2), 211-216. 10.1002/1521-396X(200209)193:2<211::AID-PSSA211>3.0.CO;2-B



cited authors

  • Zhu, WL; Feng, XQ; Huang, YL; Lin, QS; Wu, ZH

fiu authors

abstract

  • Heavily trivalent ions doped into PbWO4 will exert a distinct influence on the scintillation performance and the conductivity of the crystal. In the light of the doping mechanism, the microstructure of the heavily La3+ doped and undoped PbWO4 crystals was studied using extended X-ray absorption fine structure (EXAFS) and X-ray Photoelectron Spectroscopy (XPS). When heavily doped, La3+ may substitute the W sites as well as the Pb2+ sites for self-compensation by forming La dimers or La small aggregates, which results in a significant decrease in the light yield. Another charge compensator, the interstitial oxygen ion, was also observed and is discussed in this paper.

publication date

  • September 1, 2002

start page

  • 211

end page

  • 216

volume

  • 193

issue

  • 2