Spectroscopic evidence for defect structure in irradiated PbWO4 single crystal

✍ Scribed by Wensheng Li; Tong B Tang

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 211 KB
• Volume: 40
• Category: Article
• ISSN: 0960-8974
• DOI: 10.1016/s0960-8974(00)00005-x

✦ Synopsis

PbWO 4 has recently attracted much attention because of its scintillation applications. We have measured its dielectric response subsequent to Ar + and UV irradiation, respectively. Dielectric relaxation was observed, which we attribute to a complex color center in the WO ~2 tetrahedron. The complex color center in turn led to the distortion of the WO22 tetrahedron, which was verified by FTIR spectra showing that the v 3 and v 4 degeneracies were removed.